Can you imagine a Casio without a battery? It’s looking like that’s about to happen. Rumors have been building for months, and now it seems real: Casio’s first mechanical watch might arrive soon under the name Edifice EFK-100. If the leaks are right, this could be a huge moment for the brand and the watch world in general.
The Leaks Are Getting Real
This isn’t just online gossip anymore. Renders of the EFK-100 have popped up on Reddit and other forums, showing off a bold new look. Everything points to a mechanical Edifice model, something Casio has never done before. And it actually looks quite promising!
Casio has built its name on quartz watches, precise, affordable, and super reliable. Mechanical watches? That’s usually Seiko or Citizen territory. So hearing that Casio is working on an automatic model caught everyone off guard. But now, with leaked specs and images, it’s clear: this thing is real, and it’s coming.

Classic Edifice Style With a New Twist
The EFK-100 doesn’t throw out Edifice DNA. It keeps the sharp angles, sporty feel, and clean, brushed surfaces. The case is rumored to be around 39mm, which is perfect for everyday wear. There’s sapphire crystal on the front and a transparent caseback that shows off the movement, a first for Casio.
One of the standout features is the integrated bracelet. It flows naturally from the case, giving the watch a tighter, more modern profile on the wrist. Compared to similar styles like the Citizen Tsuyosa, the EFK-100 pulls off the sporty-elegant look better, with smarter proportions and a cleaner shape.
5 Models, One Bold Direction
Leaks suggest there will be 5 models. Four stainless steel versions come with matching bracelets and textured dials in white, blue, green, and black. The fifth version stands out with a carbon case, carbon-textured dial, and a black rubber strap. It’s definitely the edgiest of the bunch and looks more aggressive than the rest.
The dials across the EFK-100 series keep things simple. You’ll see those signature Edifice hands and markers, made to be bold and super readable. There’s a date window at 6 o’clock, which keeps everything symmetrical and adds a subtle touch of refinement.

The Movement Inside
Under the hood is what looks like the Seiko NH35 automatic movement. It’s reliable, durable, and found in tons of microbrands around the world. It offers hand-winding, hacking seconds, and a 40-hour power reserve. This is all solid stuff, especially for a brand entering mechanical territory for the first time.
The NH35 might not be flashy, but it’s trusted by many. It keeps decent accuracy, is easy to service, and is affordable, a good match for Casio’s style. We’ve covered this movement before, and it makes sense that Casio would choose something tested and dependable.
Price, Launch, and What’s Next
No official prices are out yet, but early estimates say the stainless steel models could land around $300+, while the carbon version might go over $500. That would still make Casio one of the most affordable brands offering a carbon case with a mechanical movement. As for the release date, it was originally expected in June 2025, but new sources say August 2025 is more likely now.

Honestly, it’s surprising that Casio is launching this under the Edifice line. The NH35 is a solid choice, but Casio definitely has the tech and resources to build its own movement. This could’ve been a great chance to start a new line, something that screams mechanical from the start. Still, it’s exciting. This might be the first step into a much bigger world for Casio.
Final Words – Casio Edifice EFK-100
Whether the EFK-100 becomes a hit remains to be seen. But one thing’s clear: Casio jumping into the mechanical scene could shake up the affordable automatic market in a big way. It’ll be interesting to see how the community responds once it officially drops.
More details are expected this summer, so it’s worth keeping an eye out. If the EFK-100 delivers what it promises, Casio fans, and maybe even a few Seiko loyalists, might be in for a surprise.
Note: All info and images mentioned here are from unconfirmed internet sources and haven’t been officially confirmed by Casio.