G-Shock: Collecting Casio's Unbreakable Watch
In the early 1980s, Casio engineer Kikuo Ibe dropped his watch and broke it. He set out to design a watch that would survive a fall of ten metres, resist water to ten bar and run for ten years on one battery. After many prototypes, the answer was a movement suspended inside a shock-absorbing case. The G-Shock DW-5000C appeared in 1983, and the square shape it introduced remains one of the most recognisable watch designs ever made.
Lines collectors follow
- The square. The DW-5000 and its descendants, including the DW-5600, are the core of the collection. Early versions with original modules are especially valued.
- Frogman. A diving line introduced in the 1990s, with an asymmetric case and dedicated features for divers.
- MR-G and MT-G. Premium lines in metal and advanced materials, made in Japan and finished to a high standard.
- Collaborations. Colourways designed with fashion brands, artists and shops, many released only in Japan and in small numbers.
Japan-only releases
Casio has long issued models, colours and packaging for the Japanese market alone. These domestic models often differ in their case-back markings, labels and boxes, and some were never sold abroad. They are a major reason collectors look to Japan.
Reading a G-Shock
- Module number. Printed on the case back, it identifies the movement and helps date the watch.
- Model number. On the case back and the tag, it identifies the case and colour.
- Country of manufacture. Premium lines are often made in Japan; others in several countries.
- Box and tags. Collaboration boxes, tins and tags add significant value to limited editions.
Condition
Resin bezels and straps age, becoming hard, cracked or discoloured, even on unworn watches. Replacement parts are often available, and many collectors accept them on a watch for wear, though original parts are preferred for display. Check the display for faded segments, test the backlight and buttons, and ask whether the battery has been replaced.
Buying tips
- Compare details with documented examples, since popular models are widely imitated.
- Prefer watches with the original box, tags and instructions for limited editions.
- Keep watches away from prolonged sunlight and heat to slow resin ageing.