{"title":"Japanese Horology","description":"\u003cp\u003eJapan builds some of the most exacting watches in the world, and much of its finest work has rarely left the country. This room gathers that tradition: the Grand Seiko references that met the Swiss observatory standard in the late 1960s, the King Seiko Hi-Beats built alongside them, the divers that went to the poles, and the small Tokyo ateliers whose yearly output can be counted in the hundreds.\u003c\/p\u003e\n\u003ch2\u003eWhat you will find here\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVintage Grand Seiko:\u003c\/strong\u003e the 57GS Self-Dater with its lion medallion, the 10-beat 45GS and the automatic 61GS, chosen for original dials and honest cases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKing Seiko:\u003c\/strong\u003e the 45KS Hi-Beat and the chronometer versions, Grand Seiko engineering at a gentler price.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeiko divers:\u003c\/strong\u003e the 6105 and its successors, tool watches with an expedition history.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTokyo independents:\u003c\/strong\u003e makers such as Ōtsuka Lōtec, whose watches are offered only inside Japan.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHow each watch reaches you\u003c\/h2\u003e\n\u003cp\u003eEvery watch is examined in Japan before it ships, with the reference, calibre and dial checked against the period record, and travels insured and tracked. Each one carries our authenticity guarantee: should an independent written opinion find a piece not genuine within 30 days, we refund the price and the cost of its return.\u003c\/p\u003e\n\u003cp\u003eLooking for a particular reference, or a Tokyo independent that is sold only in Japan? Our \u003ca href=\"\/pages\/hunting-salon%E2%84%A2\"\u003eHunting Salon™\u003c\/a\u003e searches on your behalf, and the curator desk replies within one to three business days.\u003c\/p\u003e\n\u003cp\u003eFurther reading: \u003ca href=\"\/blogs\/news\/grand-seiko-and-credor-collectors-guide\"\u003eGrand Seiko and Credor, a collector's guide\u003c\/a\u003e and \u003ca href=\"\/blogs\/news\/japanese-independent-watchmakers\"\u003eJapanese independent watchmaking\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"grand-seiko-9581-7010-18k-gold-78g","title":"Grand Seiko 9581-7010 Quartz Dress Watch in 18K Solid Gold, Mirror-Finish Dial, 35mm Case, 78.3g Total","description":"\u003cdiv class=\"jp-product\" data-world=\"Timepieces \u0026amp; Fine Jewelry\"\u003e\n\u003cp class=\"jp-lede\"\u003eA Grand Seiko 9581-7010 in solid 18K yellow gold, a quartz dress watch of evocative simplicity: a mirror-finished gold-tone dial, slim applied markers and a 35mm case. Paired with an aftermarket 18K gold bracelet, the whole weighs approximately 78.3g, joining Japanese restraint to real precious-metal presence.\u003c\/p\u003e\n\u003ch2\u003eThe Piece\u003c\/h2\u003e\n\u003cp\u003eGrand Seiko's 18K dress watches represent a high point of Japanese refinement, uniting disciplined design with the quiet grandeur of solid precious metal. Since 1960 the brand has pursued precision, beauty and understated clarity, and solid-gold models such as the reference 9581-7010 are among its most prestigious creations, increasingly rare today.\u003c\/p\u003e\n\u003cp\u003eThe solid 18K gold case has balanced, minimalist proportions at approximately 35mm, a classical silhouette for formal or everyday wear. Its mirror-finish gold-tone dial gives soft reflections under light, while applied gold markers and hands reinforce the understated refinement for which Grand Seiko is admired. A Grand Seiko quartz calibre provides dependable operation with the effortless accuracy of Seiko's top-grade quartz movements.\u003c\/p\u003e\n\u003cp\u003eThe bracelet is aftermarket rather than Grand Seiko original, but it is also 18K gold and complements the case in tone and weight, bringing the combined gold mass to approximately 78.3 grams. The watch shows light, age-related marks and fine scratches consistent with honest vintage use.\u003c\/p\u003e\n\u003ch2\u003eDetails\u003c\/h2\u003e\n\u003cul class=\"jp-details\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaker:\u003c\/strong\u003e Grand Seiko\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference:\u003c\/strong\u003e 9581-7010\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 18K yellow gold case; 18K gold bracelet (aftermarket)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurements:\u003c\/strong\u003e Case approx. 35mm (including lugs, excluding crown) · Wrist fit approx. 18–18.5 cm · Total weight approx. 78.3g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded:\u003c\/strong\u003e None (watch only)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial:\u003c\/strong\u003e Gold-tone, mirror finish, applied gold markers and hands\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrystal:\u003c\/strong\u003e Mineral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMovement:\u003c\/strong\u003e Grand Seiko quartz calibre\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCondition\u003c\/h2\u003e\n\u003cp class=\"jp-grade\"\u003e\u003cstrong\u003eJaponista grade B\u003c\/strong\u003e · Good, with visible wear consistent with use; fully functional.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eB, good vintage: a well-preserved Grand Seiko head with honest wear and strong material presence, paired with a non-original gold bracelet.\u003c\/li\u003e\n\u003cli\u003eDial: clean gold-tone dial with no visible stains or discoloration; indices and hands remain sharp.\u003c\/li\u003e\n\u003cli\u003eCase (18K gold): many small scratches and age-consistent surface wear; no major dents.\u003c\/li\u003e\n\u003cli\u003eBracelet (18K gold, aftermarket): not original Grand Seiko; light scratches and small wear marks; structurally sound.\u003c\/li\u003e\n\u003cli\u003eCrystal: clear, with normal vintage marks.\u003c\/li\u003e\n\u003cli\u003eMovement: quartz operation confirmed; full service history unknown and internal condition not verified; service recommended due to age.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAuthenticity \u0026amp; Care\u003c\/h2\u003e\n\u003cp\u003eGrand Seiko head, reference 9581-7010, in 18K gold; the 18K gold bracelet is aftermarket and not Grand Seiko original. Every piece is examined and documented in Japan before dispatch and is offered with the Japonista authenticity guarantee.\u003c\/p\u003e\n\u003ch2\u003eDelivery from Japan\u003c\/h2\u003e\n\u003cp\u003ePacked by hand in Japan and shipped insured and tracked by EMS or an equivalent express service. Import duties and taxes, where applicable, are payable on arrival. Returns follow our \u003ca href=\"\/policies\/refund-policy\"\u003epublished policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003cdiv class=\"jp-closing\"\u003e\n\u003cp\u003eConsidered offers are welcome through Send an Offer, and each one is reviewed personally. Pieces over $1,000 may be reserved over several payments with \u003ca href=\"\/pages\/japonista-layaway-privilege-program\"\u003eLayaway Privilege™\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eContinue browsing: \u003ca href=\"\/collections\/collectible-watches\"\u003eCollectible Watches\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"jp-related\"\u003eRelated pieces: \u003ca href=\"\/products\/seiko-galante-astro-boy-sbll005-watch\"\u003eSeiko Galante Astro Boy SBLL005 watch\u003c\/a\u003e · \u003ca href=\"\/products\/patek-philippe-golden-ellipse-3644-k18wg-1960s-manual-wind\"\u003ePatek Philippe Golden Ellipse 3644\/1\u003c\/a\u003e · \u003ca href=\"\/products\/rolex-bubbleback-3065-1946-hooded-lugs-k14-gold\"\u003eRolex Bubbleback 3065 hooded lugs in 14K gold\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jp-cta\" data-world=\"Timepieces \u0026amp; Fine Jewelry\"\u003e\n\u003cp class=\"jp-cta-eyebrow\"\u003eReference Hunting\u003c\/p\u003e\n\u003cp\u003eName the reference number, dial and year, and the Hunting Salon™ watches Japan’s collector market for it, then inspects and documents the piece before it ships insured to you. \u003ca href=\"\/pages\/hunting-salon%E2%84%A2\"\u003eRequest a watch search →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp class=\"jp-search\"\u003eCollectors also search: grand seiko 9581-7010 · grand seiko 18k gold quartz · solid gold grand seiko · vintage grand seiko gold dress watch · grand seiko 9581 · gold quartz dress watch japan\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Seiko","offers":[{"title":"Default Title","offer_id":51706916897061,"sku":null,"price":22925.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/8829\/6229\/files\/GrandSeiko9581-7010_18KYellowGold_78.3gSolidGold_Quartz_35mm_BraceletNotOriginal_2.jpg?v=1764858398"},{"product_id":"otsuka-lotec-no6-retrograde-watch","title":"Otsuka Lotec No.6 Retrograde Instrument-Dial Automatic Watch by Jiro Katayama, 40 mm, Unused Full Set","description":"\u003cdiv class=\"jp-product\" data-world=\"Timepieces \u0026amp; Fine Jewelry\"\u003e\n\u003cp class=\"jp-lede\"\u003eThe No.6 is the watch that placed Jiro Katayama's small Tokyo workshop on the world horological map. Its fan-shaped retrograde scale reads like a laboratory gauge rather than a clock, and this example is new and unused, from the official lottery release of January 2026, with its full set.\u003c\/p\u003e\n\u003ch2\u003eThe Piece\u003c\/h2\u003e\n\u003cp\u003eCreated by Tokyo watchmaker Jiro Katayama, the Otsuka Lotec No.6 is one of the most recognizable designs in modern Japanese independent watchmaking. Instead of hands sweeping over a circular dial, it presents time across a semi-circular measurement arc: the hour and minute indicators travel along fan-shaped retrograde tracks and snap back to their starting point at the end of the scale, mimicking the analog gauges of laboratory equipment, aviation instruments and industrial measuring tools.\u003c\/p\u003e\n\u003cp\u003eA rotating seconds disc adds continuous motion and emphasizes the mechanical nature of the display, and a date display completes the functions. The brushed stainless steel case favors precision finishing over decorative polish, reinforcing an identity closer to instrumentation worn on the wrist than to classical Swiss design.\u003c\/p\u003e\n\u003cp\u003eMechanically, the No.6 follows a modular philosophy: a Miyota automatic movement serves as the base engine, while a proprietary Otsuka Lotec module converts standard timekeeping into the retrograde gauge display. The approach combines proven reliability and a serviceable platform with genuine display innovation, letting engineering effort go into the originality of the display system.\u003c\/p\u003e\n\u003cp\u003eInternational recognition accelerated when the No.6 won the Challenge Watch Prize at the Grand Prix d'Horlogerie de Genève (GPHG), introducing the brand to collectors beyond Japan and giving this reference a particular place in its history. Limited production and distribution make it sought after by independent-watch collectors, mechanical-display enthusiasts, industrial-design collectors and specialists in Japanese horology.\u003c\/p\u003e\n\u003ch2\u003eDetails\u003c\/h2\u003e\n\u003cul class=\"jp-details\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaker:\u003c\/strong\u003e Otsuka Lotec (Jiro Katayama)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e No.6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine\/Series:\u003c\/strong\u003e Otsuka Lotec numbered model series (No.5 \/ No.6 \/ No.7.5 \/ No.8 \/ No.9)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Japan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 316L stainless steel, industrial brushed finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e Case diameter approx. 40 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMovement:\u003c\/strong\u003e Miyota automatic mechanical base with proprietary Otsuka Lotec module; approx. 24 jewels; 21,600 vph; power reserve approx. 40 hours\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunctions:\u003c\/strong\u003e Retrograde hour indicator, retrograde minute indicator, central seconds disc, date display\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrystal:\u003c\/strong\u003e Sapphire with anti-reflective coating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaseback:\u003c\/strong\u003e Exhibition display back\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Resistance:\u003c\/strong\u003e Daily-use resistant\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrap:\u003c\/strong\u003e Leather\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded:\u003c\/strong\u003e Original box, warranty card, manual, accessories\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProvenance:\u003c\/strong\u003e Official lottery purchase, January 2026\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCondition\u003c\/h2\u003e\n\u003cp class=\"jp-grade\"\u003e\u003cstrong\u003eJaponista grade S\u003c\/strong\u003e · Unworn or as new, complete with original packaging.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNew and unused, observed in hand.\u003c\/li\u003e\n\u003cli\u003eComplete set with watch, original box, warranty card, manual and accessories.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eOtsuka Lotec Atelier\u003c\/h2\u003e\n\u003cp\u003eOtsuka Lotec was founded in Tokyo by the designer and engineer Jiro Katayama, who came to watchmaking through industrial design, metalworking and a fascination with mechanical instruments rather than a Swiss apprenticeship. His founding idea was that a wristwatch could be treated as a miniature instrument whose architecture, materials and motion communicate time with the clarity of a scientific tool. Brushed plates, exposed screws, engraved scales, retrograde arcs and layered mechanical structures make the dial read like a laboratory gauge, an aviation instrument or a mechanical dashboard.\u003c\/p\u003e\n\u003cp\u003eModels are identified by number rather than name; the No.5 Kai, No.6, No.7.5, No.8 and No.9 trace the evolution of Katayama's design language. Production is small-scale and atelier-like, often distributed in restricted quantities through lotteries or tightly controlled releases within Japan, and the watches typically combine reliable Japanese mechanical base movements with proprietary display modules of Katayama's design.\u003c\/p\u003e\n\u003ch2\u003eAuthenticity \u0026amp; Care\u003c\/h2\u003e\n\u003cp\u003eAcquired new through the official Otsuka Lotec lottery release in January 2026 and accompanied by the maker's warranty card, manual and original box. Every piece is examined and documented in Japan before dispatch and is offered with the Japonista authenticity guarantee.\u003c\/p\u003e\n\u003ch2\u003eDelivery from Japan\u003c\/h2\u003e\n\u003cp\u003ePacked by hand in Japan and shipped insured and tracked by EMS or an equivalent express service. Import duties and taxes, where applicable, are payable on arrival. Returns follow our \u003ca href=\"\/policies\/refund-policy\"\u003epublished policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003cdiv class=\"jp-closing\"\u003e\n\u003cp\u003eConsidered offers are welcome through Send an Offer, and each one is reviewed personally. Pieces over $1,000 may be reserved over several payments with \u003ca href=\"\/pages\/japonista-layaway-privilege-program\"\u003eLayaway Privilege™\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eContinue browsing: \u003ca href=\"\/collections\/collectible-watches\"\u003eCollectible Watches\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"jp-related\"\u003eRelated pieces: \u003ca href=\"\/products\/otsuka-lotec-no-7-5-jumping-hour-automatic-watch-jiro\"\u003eOtsuka Lotec No.7.5 jumping hour watch\u003c\/a\u003e · \u003ca href=\"\/products\/otsuka-lotec-no5-kai-jump-hour-watch-full-set\"\u003eOtsuka Lotec No.5 Kai jump hour watch\u003c\/a\u003e · \u003ca href=\"\/products\/hublot-mdm-skeleton-ref-1512-3-18k-yellow-gold-frederic\"\u003eHublot MDM Skeleton 1512.3 yellow gold watch\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jp-cta\" data-world=\"Timepieces \u0026amp; Fine Jewelry\"\u003e\n\u003cp class=\"jp-cta-eyebrow\"\u003eReference Hunting\u003c\/p\u003e\n\u003cp\u003eName the reference number, dial and year, and the Hunting Salon™ watches Japan’s collector market for it, then inspects and documents the piece before it ships insured to you. \u003ca href=\"\/pages\/hunting-salon%E2%84%A2\"\u003eRequest a watch search →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp class=\"jp-search\"\u003eCollectors also search: otsuka lotec no.6 · otsuka lotec no 6 retrograde · jiro katayama watch · japanese independent watchmaker retrograde · otsuka lotec gphg challenge prize · otsuka lotec for sale unused\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Otsuka Lotec","offers":[{"title":"Default Title","offer_id":52072625078565,"sku":null,"price":13750.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/8829\/6229\/files\/OTSUKALOTECNo6RetrogradeWatchJapaneseIndependentHorologyJiroKatayamaInstrumentDial_1.jpg?v=1773383346"},{"product_id":"otsuka-lotec-no-7-5-jumping-hour-automatic-watch-jiro","title":"Otsuka Lotec No.7.5 Jumping Hour Automatic Watch by Jiro Katayama, Disc Display, 40 mm, Unused Full Set","description":"\u003cdiv class=\"jp-product\" data-world=\"Timepieces \u0026amp; Fine Jewelry\"\u003e\n\u003cp class=\"jp-lede\"\u003eJiro Katayama's No.7.5 abandons the conventional dial for an instrument panel of three mechanical ports: a jumping hour aperture, a rotating minute disc and a seconds disc magnified by a sapphire fisheye lens. This example is new and unused, with box, documents, strap and tags.\u003c\/p\u003e\n\u003ch2\u003eThe Piece\u003c\/h2\u003e\n\u003cp\u003eDesigned in Tokyo by Jiro Katayama, the Otsuka Lotec No.7.5 is one of the most visually distinctive mechanical watches of Japan's modern independent movement. Time is read through a three-window interface rather than hands: the hour numeral jumps instantly at the start of each hour, a rotating disc replaces the minute hand, and a small seconds disc keeps the dial in constant motion. The arrangement evokes the analog gauges of laboratory equipment and aviation instruments, a miniature mechanical console rather than a classical watch face.\u003c\/p\u003e\n\u003cp\u003eThe seconds display sits beneath a sapphire fisheye lens whose optical distortion adds depth and curiosity. Mechanically the watch pairs the Miyota 82S5 automatic, a durable and serviceable Japanese caliber, with Otsuka Lotec's own jumping hour module, which converts conventional hour and minute motion into the disc-based display while keeping dependable reliability.\u003c\/p\u003e\n\u003cp\u003eThe 316L stainless steel case carries the same industrial philosophy, finished with hairline brushing and sandblasting instead of mirror polish for a utilitarian, tool-instrument appearance. Katayama began building watch cases and mechanical displays in his small workshop around 2008; early prototypes evolved into the numbered system used today, and the brand gained international recognition when the No.6 won the GPHG Challenge Watch Prize.\u003c\/p\u003e\n\u003cp\u003eThe No.7.5 belongs to the modern catalog era, in which Katayama refined modular mechanical displays built on industrial design principles, and it is one of the clearest expressions of that philosophy. Production volumes are extremely limited, which draws independent-watch enthusiasts, mechanical-display collectors, industrial-design enthusiasts and specialists in Japanese horology.\u003c\/p\u003e\n\u003ch2\u003eDetails\u003c\/h2\u003e\n\u003cul class=\"jp-details\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaker:\u003c\/strong\u003e Otsuka Lotec (Jiro Katayama, Tokyo)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e No.7.5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine\/Series:\u003c\/strong\u003e Otsuka Lotec numbered model series (No.5 \/ No.6 \/ No.7.5 \/ No.8 \/ No.9)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Japan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 316L stainless steel; hairline brushed and sandblasted industrial finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e Diameter 40 mm · Thickness 11.2 mm (max 14.8 mm) · Lug width 20 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMovement:\u003c\/strong\u003e Miyota 82S5 automatic base with proprietary Otsuka Lotec jumping hour module; 24 jewels; 21,600 vibrations\/hour; power reserve approx. 40 hours\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunctions:\u003c\/strong\u003e Jumping hour, minute disc, seconds disc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrystal:\u003c\/strong\u003e Sapphire with anti-reflective coating; sapphire fisheye lens for disc magnification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaseback:\u003c\/strong\u003e Exhibition sapphire caseback\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Resistance:\u003c\/strong\u003e Daily-life resistant\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrap:\u003c\/strong\u003e Calf leather\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded:\u003c\/strong\u003e Box, documents, strap and tags\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCondition\u003c\/h2\u003e\n\u003cp class=\"jp-grade\"\u003e\u003cstrong\u003eJaponista grade S\u003c\/strong\u003e · Unworn or as new, complete with original packaging.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNew and unused condition, observed in hand.\u003c\/li\u003e\n\u003cli\u003eFull set with box, documents, strap and tags.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eOtsuka Lotec Atelier\u003c\/h2\u003e\n\u003cp\u003eOtsuka Lotec was founded in Tokyo by the designer and engineer Jiro Katayama, who came to watchmaking through industrial design, metalworking and a fascination with mechanical instruments rather than a Swiss apprenticeship. His founding idea was that a wristwatch could be treated as a miniature instrument whose architecture, materials and motion communicate time with the clarity of a scientific tool. Brushed plates, exposed screws, engraved scales, retrograde arcs and layered mechanical structures make the dial read like a laboratory gauge, an aviation instrument or a mechanical dashboard.\u003c\/p\u003e\n\u003cp\u003eModels are identified by number rather than name; the No.5 Kai, No.6, No.7.5, No.8 and No.9 trace the evolution of Katayama's design language. Production is small-scale and atelier-like, often distributed in restricted quantities through lotteries or tightly controlled releases within Japan, and the watches typically combine reliable Japanese mechanical base movements with proprietary display modules of Katayama's design.\u003c\/p\u003e\n\u003ch2\u003eAuthenticity \u0026amp; Care\u003c\/h2\u003e\n\u003cp\u003eComplete with the maker's box, documents and tags; base caliber Miyota 82S5 with Otsuka Lotec's proprietary jumping hour module. Every piece is examined and documented in Japan before dispatch and is offered with the Japonista authenticity guarantee.\u003c\/p\u003e\n\u003ch2\u003eDelivery from Japan\u003c\/h2\u003e\n\u003cp\u003ePacked by hand in Japan and shipped insured and tracked by EMS or an equivalent express service. Import duties and taxes, where applicable, are payable on arrival. Returns follow our \u003ca href=\"\/policies\/refund-policy\"\u003epublished policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003cdiv class=\"jp-closing\"\u003e\n\u003cp\u003eConsidered offers are welcome through Send an Offer, and each one is reviewed personally. Pieces over $1,000 may be reserved over several payments with \u003ca href=\"\/pages\/japonista-layaway-privilege-program\"\u003eLayaway Privilege™\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eContinue browsing: \u003ca href=\"\/collections\/collectible-watches\"\u003eCollectible Watches\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"jp-related\"\u003eRelated pieces: \u003ca href=\"\/products\/otsuka-lotec-no6-retrograde-watch\"\u003eOtsuka Lotec No.6 retrograde watch\u003c\/a\u003e · \u003ca href=\"\/products\/otsuka-lotec-no5-kai-jump-hour-watch-full-set\"\u003eOtsuka Lotec No.5 Kai jump hour watch\u003c\/a\u003e · \u003ca href=\"\/products\/lv-tambour-pm-sakura-q1k09-pink-diamond-watch\"\u003eLouis Vuitton Tambour PM Sakura Q1K09 watch\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jp-cta\" data-world=\"Timepieces \u0026amp; Fine Jewelry\"\u003e\n\u003cp class=\"jp-cta-eyebrow\"\u003eReference Hunting\u003c\/p\u003e\n\u003cp\u003eName the reference number, dial and year, and the Hunting Salon™ watches Japan’s collector market for it, then inspects and documents the piece before it ships insured to you. \u003ca href=\"\/pages\/hunting-salon%E2%84%A2\"\u003eRequest a watch search →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp class=\"jp-search\"\u003eCollectors also search: otsuka lotec no.7.5 · otsuka lotec jumping hour · jiro katayama no 7.5 · japanese independent jumping hour watch · otsuka lotec miyota 82s5 · otsuka lotec unused full set\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Otsuka Lotec","offers":[{"title":"Default Title","offer_id":52072625701157,"sku":null,"price":10850.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/8829\/6229\/files\/OTSUKALOTECNo7.5JumpingHourWatchJapaneseIndependentHorologyJiroKatayamaDiscDisplayWatch_1.jpg?v=1773382547"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/8829\/6229\/collections\/hf_20261011_074006_34f92561-f09d-491b-93c9-af089ca2e803.png?v=1791704434","url":"https:\/\/japonista.com\/collections\/japanese-horology.oembed","provider":"Japonista","version":"1.0","type":"link"}