Casio's long-awaited titanium automatic watches are finally official

After weeks of leaks and speculation, Casio has officially announced its CMK-100 series of automatic watches. The October 29 announcement confirms five variants, two more than previously anticipated, along with additional details about their construction and specifications.

The CMK-100 series first surfaced in September, followed by another leak earlier this month that offered a closer look at three models. Those reports identified the CMK-100TD-1A, CMK-100TC-1A, and CMK-100TL-1A, featuring titanium, nylon, and leather bands, respectively.

Casio has now confirmed all three alongside two additional references: the CMK-100TCC-8A and CMK-100TCL-5A. The former features a grey dial with a nylon strap, while the latter combines a brown dial with a leather band. The remaining models feature black dials.

All five watches feature lightweight titanium cases with brushed finishes, textured matte dials, and raised luminous hour markers. According to detailed specifications published by Vietnamese retailer G-Shock Hải Phòng, the cases measure 44.7 × 38 × 11.4 mm and feature sapphire crystals, screw-down crowns, and screw-down casebacks. Weight varies by strap configuration. The titanium-bracelet CMK-100TD weighs 98 g, while the nylon variants weigh just 55 g. Both leather-equipped models are slightly lighter at 54 g.

Under the hood, the watches reportedly use Casio’s Module 5766, a Japanese-made automatic movement offering 42 hours of power reserve. The retailer also lists manual winding, hacking seconds, and an accuracy rating of −20 to +40 seconds per day. Casio has confirmed the Japanese-made automatic movement but has not explicitly identified its manufacturer. Earlier leaks suggested the Miyota 8215.

The watches also feature 100 metres of water resistance, making them suitable for everyday use and outdoor activities. Casio has yet to announce official pricing or specific regional availability dates, although earlier rumors suggested prices between $280 and $300.