Casio G-Shock MR-G MRGB2100B-1A Kumiki-Kohshi Design Bluetooth Watch

The bezel is formed from a total of 27 separate components instead of a single piece. Each part is polished prior to assembly to give the watch a distortion-free finish, right down to the most challenging spots, like recessed portions. The band, too, has dimpled portions constructed with separate componentry. The artisanal craftwork shines through each and every component — just look at the stunning, distortion-free mirror finishes created with Sallaz polishing.

Buffering is inserted between the parts of the multi-component bezel and case, providing excellent shock-absorption to help absorb impacts to the module.

The top bezel is made with COBARION, an alloy boasting a hardness about four times that of pure titanium and a brilliant gleam comparable to platinum. The band links employ DAT55G, a titanium alloy with a hardness about three times that of pure titanium that offers excellent processability. With these super-hard alloys developed in Japan, Casio achieved an exterior design that ensures both strength and beauty. A special Ti64 titanium alloy is used for the case, case back and buttons.

*COBARION is a trademark of a cobalt-chromium alloy manufactured exclusively by Eiwa Corporation.
*DAT and DAT55G are registered trademarks of Daido Steel Co., Ltd.

The dial design incorporates special decorative aspects inspired by traditional Japanese kigumi wooden joinery techniques. The base surface is given a corrugated form with an intricate series of openings to create a geometric pattern beautifully expressing a latticework worldview. The elaborate series of openings in the face let enough light through for solar power generation, allowing the dial to be given a profound metallic black finish. In addition, the index mark at 12 o’clock features an intricately assembled two-part structure. This kind of craftwork, which demands the very highest precision, is only possible thanks to the fine processing technologies of Yamagata Casio.

*Graphic illustrates light passing through the open latticework pattern on the dial.

Kigumi
Kigumi is a traditional Japanese construction method and woodworking technique used for wooden joinery without the use of nails or other metal fittings. It has been employed since the Heian period (794–1185) to build wooden structures, including shrines and temples, as well as wooden fixtures. With the stunning degree of precision the technique uses to create forms with both structural strength and artistic design sensibility, kigumi is considered an artisanal form of craftwork. Such wooden framework techniques producing intricate geometric patterns can be observed in traditional handicrafts, as well.