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Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Yes—Casio’s Edifice EFK-100 is the company’s first watch with a mechanical movement. Introduced in 2025, it combines automatic winding with manual winding, a sapphire crystal, a transparent caseback and motorsport-inspired styling. The launch range comprises the 39 mm EFK-100D, the 39 mm forged-carbon-dial EFK-100CD and the 40 mm EFK-100XPB premium model.
What makes the EFK-100 a first for Casio?
Casio’s June 16, 2025 announcement describes the EFK-100 as using “the first ever mechanical movement in a Casio timepiece.” The U.S. product positioning calls it “The First Casio Automatic Watch.” That is a significant change for Edifice, a line long associated with quartz and electronic watches developed around automotive and motorsport themes.
The EFK-100 uses a traditional automatic movement that can also be wound by hand. A transparent caseback exposes the movement, turning the mechanical mechanism into part of the watch’s visual appeal. Casio links that approach to the tactile appeal of driving and mechanical engineering; product-planning representative Tadashi Kojima said, “Many car enthusiasts enjoy the feeling of control.”
Core specifications
| Specification | EFK-100 range |
|---|---|
| Movement | Automatic with manual winding |
| Jewels | 24 |
| Beat rate | 21,600 vibrations per hour |
| Stated accuracy | Mean daily rate of -35 to +45 seconds |
| Power reserve | Approximately 40 hours |
| Display | Three hands and date |
| Hacking | Yes; the seconds hand stops when the crown is pulled to the setting position |
| Crystal | Scratch-resistant sapphire crystal |
| Water resistance | 10 bar |
| Caseback | Transparent display back |
The -35 to +45 seconds-per-day figure is Casio’s stated mean daily rate, not a guarantee that every watch will remain within exactly that range in every position, temperature or state of wind. The approximately 40-hour reserve means the watch can stop after roughly that period without winding or wearing it; restarting it requires winding and setting.
#1 Best Overall
- Automatic Movement With Manual Winding
- See-through Screw Lock Back
- 100m Water Resistant
- Solid Stainless Steel Case With One-touch 3-fold Clasp
- Power Reserve: Approximately 42 Hours on Winding The Spring Sufficiently
EFK-100D, EFK-100CD and EFK-100XPB: what is different?
| Model | Dial and material distinction | Case diameter | Published European RRP at launch |
|---|---|---|---|
| EFK-100D | Electroformed dial texture reproducing the look of forged carbon | 39 mm | €279 |
| EFK-100CD | Real forged-carbon dial | 39 mm | €299 |
| EFK-100XPB | Premium variant; the cited specifications do not state a different dial construction | 40 mm | €449 |
Casio’s European launch information lists sales from August 1, 2025. The euro figures are published European recommended retail prices, so a buyer’s actual price can vary by country, taxes, retailer and later promotions. They should not be treated as a current worldwide price or proof of stock.
EFK-100D: the lower-priced launch model
The EFK-100D uses electroforming to create a forged-carbon-style surface rather than a dial made from forged carbon itself. Its 39 mm case and €279 European RRP place it at the entry point of the launch range while retaining the same automatic/manual-winding concept and core functions.
EFK-100CD: genuine forged carbon
The EFK-100CD is also 39 mm, but its dial is made from real forged carbon. That material distinction is the main reason for its higher €299 European RRP. Buyers choosing between the D and CD are therefore paying primarily for the dial material, not a different movement or a larger case.
EFK-100XPB: the premium 40 mm option
Casio lists the EFK-100XPB as a premium variant with a 40 mm case and a €449 European RRP at launch. The available launch specifications establish its size and price tier, but do not establish a separate movement architecture or additional everyday functions.
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Rank #2
- CASIO EDIFICE presents a EFK-110D timepiece, the sports car enthusiast’s favorite. This automatic, three-hand beauty brings sophisticated, refined style to your wrist.
- The sporty, yet refined watch design features a slim, compact case measuring just 38mm and a richly textured dial crafted with a special electroforming technique. High-transparency, scratch-resistant sapphire crystal delivers clear visibility, while raised indexes as well as a sharp bezel and case complete the dynamic, yet sophisticated design.
- The automatic movement, crafted in Japan, offers a power reserve of around 42 hours. With a see-through case back that reveals the movement’s meticulous motion, you will truly understand the unique appeal of a mechanical watch.
- Water resistance up to 10 bar leaves you free to focus on more exciting things, whether outdoor activities, watersports, or just enjoying your day-to-day.
What the mechanical specification means in daily use
Automatic winding plus manual control
Wearing the watch supplies energy to its automatic winding system. If it has stopped, turning the crown manually can wind it before setting the time. This gives the EFK-100 the traditional mechanical-watch interaction that a battery-powered Edifice does not provide.
Hacking and setting the date
The hacking function stops the seconds hand while the crown is pulled out for time setting, making synchronization easier. The three-hand display is supplemented by a date indication. As with any mechanical watch, the date should be adjusted using the crown’s appropriate date-setting position and not forced when the mechanism is changing over; Casio’s model instructions should take precedence for the exact crown procedure.
Sapphire crystal and 10-bar resistance
Sapphire is substantially more scratch-resistant than common mineral crystal, although it can still be damaged by a sufficiently hard impact. A 10-bar rating gives the watch a useful everyday water-resistance rating, but it is not a statement that every activity or condition is suitable. Water resistance can also change as seals age or after servicing, so the rating should not be read as a promise of permanent protection.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why this matters for the Edifice line
The EFK-100 broadens Edifice beyond its established quartz and electronic identity without abandoning the line’s automotive language. The forged-carbon theme, exposed movement and case design connect a conventional mechanical watch with sports-car engineering rather than presenting it as a generic dress watch.
Rank #3
- CASIO EDIFICE presents a EFK-110D timepiece, the sports car enthusiast’s favorite. This automatic, three-hand beauty brings sophisticated, refined style to your wrist.
- The sporty, yet refined watch design features a slim, compact case measuring just 38mm and a richly textured dial crafted with a special electroforming technique.
- High-transparency, scratch-resistant sapphire crystal delivers clear visibility, while raised indexes as well as a sharp bezel and case complete the dynamic, yet sophisticated design.
That positioning also explains the model spread. The EFK-100D offers the visual texture at the lowest launch price, the EFK-100CD adds authentic forged carbon, and the EFK-100XPB moves into a larger, more expensive premium tier. Across the range, the appeal is the combination of visible mechanics and motorsport styling, not a new set of complications.
Which EFK-100 should you choose?
- Choose the EFK-100D if you want the smallest launch case and the lowest published European RRP, and the electroformed carbon look is sufficient.
- Choose the EFK-100CD if the authenticity of a real forged-carbon dial matters enough to justify the modest step up from the D.
- Choose the EFK-100XPB if you prefer the 40 mm premium model and accept its substantially higher launch price; the cited specifications do not document extra complications.
All three choices share the central proposition: an automatic movement that can be manually wound, a date, hacking, sapphire crystal, 10-bar water resistance and a display back. The meaningful decision is therefore case size, dial construction and price tier.
What the launch information does not establish
Casio’s launch specifications do not establish post-launch accuracy measurements from independent testing, long-term durability results, current retailer inventory or a universal street price. Those details can differ by market and date. Treat the published European RRPs and the stated -35 to +45 seconds-per-day rate as launch specifications, not as a current purchase quote or a personal performance report.
