Casio CMK-100 Brings Titanium and Automatic Movement to Its Core Watch Line
Casio’s first core-line automatic pairs a titanium case with field-watch styling, 100m water resistance and prices from $320.

Casio’s CMK-100 makes two notable moves at once: it brings an automatic movement to the brand’s core watch line and puts that movement inside a titanium case. The result is a compact field-style watch with a 38mm case, 100m water resistance and prices starting at $320. For a company long associated with quartz watches, it marks a clear expansion of the main catalog.
CasioThe move follows Casio’s earlier step into mechanical watches through its Edifice line. The EFK-100 has appeared in several versions, including one with forged carbon. The CMK-100 brings an automatic watch to Casio’s core catalog, outside Edifice and G-Shock, and pairs that change with a case material more often associated with a higher price.
The watch is scheduled to arrive on Casio’s US site November 19. It has already appeared on the brand’s international sites, with prices running from $320 for a nylon-strap model to $440 for the titanium bracelet version. That spread makes the strap and finish choices a meaningful part of the purchase: the dial and basic watch design stay consistent, while the wearing experience and price vary.
A restrained field-watch layout
Casio gives the CMK-100 a slightly textured dial in black, gray or brown. Large numerals mark 6, 9 and 12, with a date window at 3 o’clock and baton indices filling the other hour positions. The three-hand layout keeps the display straightforward. Phosphorescent paint on the hands and markers is intended to make them visible in low light.

Under the sapphire crystal, the dial carries only the Casio name, “Automatic” and “Japan Mov’t.” Its numerals and typography may recall designs from other watchmakers, but the overall package is notably simple. The watch is built around legibility and a familiar field-watch arrangement rather than a crowded display.


Its rounded, cushion-style case has a flat bezel and measures 38mm across and 11.4mm thick. Those dimensions give readers a practical sense of its footprint, while the 100m water-resistance rating describes the watch’s stated resistance to water. The source doesn’t specify any other use conditions, so those figures are the clearest fit and performance details available.
Titanium across the range
Casio uses titanium for every listed case option, including the bronze- and gray-tone versions. The cases receive titanium carbide and ion plating, which the company describes as treatments for abrasion resistance. Titanium also helps keep the watch light without relying on a resin case. A titanium bracelet is available on some versions; other configurations use leather or nylon.

Band availability depends on the dial. The black version is offered with a titanium bracelet, a nylon strap or an Italian leather strap. On the leather model, the hands and markers have a faux-aged fill. Gray is currently paired only with nylon, while brown comes with a matching brown leather strap. The article describes five colorways in total, though it gives specific strap details for these dial options.


An automatic caliber with 42 hours of reserve
Casio hasn’t named the Japanese automatic caliber inside the CMK-100. Its reported specifications are 21 jewels and 42 hours of power reserve, and the source says they closely resemble those of the Miyota 8215. That comparison is not confirmation of the movement’s identity. The CMK-100’s caliber also differs from the one used in the Edifice automatic, which was based on the Seiko NH35 and had somewhat different specifications.

For buyers comparing the available versions, the reported movement details and case measurements are the same starting points across the story’s description; the choice of strap determines which listed price applies. The bracelet model reaches $440, while nylon starts at $320. Casio’s move into core-line automatics is still new, and the CMK-100 gives the brand a distinct place to build on that format.
Casio has been closely associated with quartz watches since the Casiotron debuted in 1974. The CMK-100 adds a mechanical option to that history, following the Edifice-branded EFK-100. Casio’s announcement of its mechanical movement in Edifice last year set up the question of whether automatic watches would reach its other lines. This model answers that question for the core catalog.
The CMK-100 is expected on Casio’s US site November 19, with international listings already available. For a buyer, the defining choice is whether the titanium bracelet is worth the price difference over nylon or leather. For Casio, the more telling next step will be whether it develops further versions of this compact automatic design.
Casio
