Audemars Piguet Royal Oak 66240BA de oro amarillo de 18 quilates, cuarzo, engaste de diamantes posterior, detalles negros, 26mm

A compact 26mm Royal Oak in 18K yellow gold, transformed by extensive diamond setting and rhythmic black accents into something between wristwatch and jewel. Its champagne dial with twelve diamond markers stays calm at the center, and its 2019 Audemars Piguet service documentation gives the piece a clear recorded history, with the diamond work openly disclosed as aftermarket.

The Piece

The Royal Oak rarely needs help making an entrance, and this example turns the volume considerably higher. Warm yellow gold forms the case and integrated bracelet, brilliant stones illuminate the shoulders and links, and rectangular black accents interrupt the gold at rhythmic intervals, giving the bracelet a graphic quality that grows more striking the closer it is examined. It is a compact watch with a remarkably large visual presence.

The case measures approximately 26mm across, keeping the elegant proportions of the smaller vintage Royal Oak references. The octagonal bezel, punctuated by exposed screws, forms the visual foundation, and a dark contrasting bezel treatment frames the dial and distinguishes the piece from conventional yellow-gold Royal Oaks. Viewed head-on the watch feels formal; viewed at an angle, the densely diamond-set shoulders and the abundance of stones across the bracelet become far more apparent.

The champagne-toned dial carries a finely textured geometric surface, twelve individually mounted diamond hour markers and slender yellow-gold hands. There is no date window or complication; the two-hand display leaves the ring of markers unbroken, and the Audemars Piguet signature remains the focal point of the upper dial. The restraint matters, because the bracelet supplies so much visual energy.

The integrated bracelet continues directly from the case. Rows of yellow-gold links are punctuated by black rectangular accents and diamond-set sections of varying size, larger brilliant stones providing focal points while smaller stones fill the surrounding architecture, so the jewelry design continues around the wrist instead of ending at the case. An Audemars Piguet folding clasp completes the construction. The watch weighs approximately 97.5 grams, a substantial precious-metal presence despite its compact size, and is powered by Audemars Piguet quartz caliber 2508, a slim Swiss movement suited to the case.

Introduced in 1972, the Royal Oak's octagonal bezel, exposed screws and integrated bracelet challenged the divide between formal luxury watches and sporting design. Later smaller-format interpretations turned that architecture into a more jewel-like object, with precious metals, hard decorative materials and diamonds as natural extensions. This example sits at the far end of that evolution, between vintage watchmaking, precious-metal design and custom jewelry, yet the underlying design remains unmistakable.

Details

• Maker: Audemars Piguet
• Reference: 66240BA
• Line: Royal Oak
• Origin: Switzerland (Swiss Made)
• Material: 18K yellow-gold case and integrated bracelet; aftermarket diamond setting with black accent detailing
• Dial: Champagne textured dial with twelve diamond hour markers; yellow-gold hands; two-hand display (hours and minutes)
• Measurements: Case diameter approx. 26mm · Current wrist fit approx. 16.5cm · Additional bracelet component approx. 8.2mm
• Weight: Approx. 97.5g total
• Movement: Quartz, Audemars Piguet caliber 2508
• Clasp: Audemars Piguet folding clasp
• Service History: Complete maintenance service through Audemars Piguet in 2019, including replacement of hands, case ring and dial; documented total equivalent to approx. $2,923 USD at the 2019 exchange rate
• Included: Audemars Piguet service documentation; manufacturer repair and maintenance invoice; additional bracelet component (approx. 8.2mm); additional fully diamond-set dial

Condition

• Near unused, with an excellent pre-owned presentation: bright yellow-gold surfaces, a visually clean dial and a consistent overall presentation across the diamond-set areas.
• As with any vintage precious-metal watch, minute handling marks or surface traces may be present when examined closely.
• Case: recognizable Royal Oak geometry with strong yellow-gold color; no major impact damage is evident in the photographs.
• Dial: attractive and balanced; diamond markers appear evenly positioned and the signature remains clearly visible.
• Hands: present cleanly and are documented as replaced during manufacturer service.
• Bracelet: extensive diamond setting and black accent detailing throughout; current fit approx. 16.5cm, with an additional component of approx. 8.2mm included.
• No presentation box or further documentation should be assumed beyond the items under Included unless pictured or confirmed before shipment.

Documented Service & Modification

The supplied service document records work performed through Audemars Piguet in 2019. It identifies the watch as reference 66240BA with caliber 2508 and records a complete maintenance service together with additional replacement work, including replacement of the hands, case ring and dial. The documented total service expenditure was equivalent to approximately $2,923 USD at the 2019 exchange rate, and the record forms an important part of the watch's accompanying history.

Diamond work on the present watch is explicitly identified as aftermarket diamond setting. A separate fully diamond-set dial also accompanies the watch.

Authenticity & Care

Audemars Piguet service documentation from 2019 identifies the watch as reference 66240BA with caliber 2508. The diamond work is explicitly identified as aftermarket setting, so no representation is made that the installed diamonds were factory set by Audemars Piguet; collectors who prioritize original factory configuration should review the photographs and documents carefully. Every piece is examined and documented in Japan before dispatch and is offered with the Japonista authenticity guarantee.

Delivery from Japan

Packed 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 published policy.

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