Casio Edifice EFK-100XPB Quick Review — forging its mark in history
Casio Edifice EFK-100XPB-1A
The overall shape and design is pretty standard and inoffensive, the forged carbon construction feels incredibly premium, but the lack of AR coating can get annoying.
What's Good?
- Premium forged carbon case and dial
- Surprisingly tight out-of-the-box accuracy
What's Not?
- Terrible legibility
Casio is a brand we all know and love for quartz precision, indestructible G-Shocks, and digital classics. So when the brand dropped the Edifice EFK-100 series, it was a massive milestone: Casio’s first-ever mechanical automatic watch line. While there are a few standard stainless steel models in the lineup, the range-topping EFK-100XPB-1A goes all-in on high-end motorsport materials by utilizing real forged carbon for its case and dial. After spending some quality time with this stealthy automatic on the wrist, here’s what we think about it.
Table of Contents
Casio Edifice EFK-100XPB — what’s good?
Premium forged carbon case and dial
The standout feature of the Casio EFK-100XPB-1A is undoubtedly its construction. Usually reserved for high-end sports cars and luxury timepieces, forged carbon is exceptionally light and strong. Because carbon fibers are randomly pressed under intense heat and pressure, the marbled pattern on every single watch case and dial is entirely unique. To further enhance the overall understated look, Casio went with a polished black ion-plated bezel and dark gray indices and skeletonized hands.
Measuring 40mm across, it wears remarkably light on the wrist. At just 87g, the EFK-100XPB comes in at almost half the weight of its stainless steel brethren. Part of the weight savings might be due to to the switch to an integrated urethane strap as well. I also quite like that Casio went with a 3-fold button clasp for the strap as well, instead of the usual pin-buckle straps. I feel Casio did extremely well with the interplay of the polished bezel, matte carbon fiber and brushed end links, giving off clean, high-performance vibes.
Surprisingly tight out-of-the-box accuracy
Under the hood, Casio opted for a trusted workhorse instead of trying to build an in-house movement from scratch: the TMI (Seiko) NH35A. I won’t claim to know too much about automatic movements, but from what I have gleaned from some Googling, it is a reliable, hacking, and hand-winding automatic caliber that is easy to service and built to last.
While Casio officially lists the Casio EFK-100XPB with a fairly wide daily variance of -35 to +45 seconds, our real-world testing tells a completely different story. Our unit ran incredibly tight, keeping time well within -1 sec/day. Of course, this might be limited to this specific sample, unless Casio really committed to precise regulation for their first automatic watch. For an affordable mechanical caliber, this kind of out-of-the-box accuracy is fantastic and punches way above its official rating.
Casio Edifice EFK-100XPB — what’s not?
Terrible legibility
Because the watch relies on a fully blacked-out aesthetic with a dark carbon dial, matte black hands, and dark indices, visibility is already naturally limited. While sapphire crystal is a highly welcome premium addition at this price point, Casio made a frustrating compromise. The flat sapphire crystal lack an anti-reflective (AR) coating, which sees the flat crystal act like a literal mirror under direct sunlight or bright office downlights.
The minimal lume just further exacerbates the issue, with it being nigh illegible in the dark. Lume is only applied on the very tips of the hour and minute hands, and Casio wasn’t exactly generous with it here, so it fades out rather quickly. If you are particular about being able to see the time at a glance in any situation, this might not be the watch for you.
Casio Edifice EFK-100XPB Specifications
| Size | 40mm (45mm lug-to-lug) |
| Thickness | 12.5mm |
| Weight | 87g |
| Case Material | Forged carbon & black ion-plated stainless steel |
| Crystal | Flat Sapphire |
| Movement | TMI (Seiko) NH35A Hacking, hand-winding, bi-directional automatic winding 21,600 vph (3Hz) 24-jewel Approx. 41-hour power reserve |
| Water Resistance | 100 meters (10 bar) |
| Strap | Matte black resin with tri-fold deployment clasp |
Casio Edifice EFK-100XPB — should you get this?
If you are a fan of Casio and want to own a unique piece of the brand’s history, the EFK-100XPB is a really compelling watch, especially since it comes in at a very attainable price of just ¥74,800 JPY (Approx. RM1,880). On top of that, it does have a definite appeal as a Japan-exclusive model that has also since been discontinued. While I doubt it will ever reach collector status as Casio continues to churn out the EFK-110 and EFK-200 series, it does not detract from the fact that you have the one of the first automatic Casio watches on your wrist.
Novelty factor aside, the forged carbon construction feels incredibly premium, and the automatic Seiko movement inside ensures it will be a reliable companion for years to come. On paper, the Casio EFK-100XPB ticks all the boxes. Forged carbon construction, reliable automatic movement, sapphire glass. However, the latter’s lack of an AR coating on a blacked-out dial is a pretty noticeable daily annoyance. If legibility is a priority for you, it might be worth looking at the steel-cased sibling, the EFK-100CD which shares the forged carbon dial but swaps out the blacked-out indices and hands for brighter silver ones. But if you are willing to overlook the poor legibility for that sleek stealthy high-tech carbon aesthetic, this is a great, history-making addition to any collection.
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