Yema · Wristmaster

Wristmaster

Name: Yema Wristmaster
Brand: Yema

Premium $1,300+

The Yema Wristmaster Slim is a 39mm French integrated-bracelet sports watch built around an in-house CMM.20 micro-rotor caliber that measures just 3.7mm thick, assembled in Morteau, France. Its octagonal case architecture, deeply textured dial, and sapphire exhibition caseback deliver a genuinely manufacture proposition at a price that undercuts comparable Swiss offerings.

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39mm

Case

100m

Water res.

9mm

Thick

43.5mm

Lug-to-lug

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Overview

Brand	Yema
Reference	76.24.05.SN.M
Collection	Wristmaster
Category	Sports
Released	2024
Price guide	Premium · $1,300+

Full specification

Specs

Case & dial

Diameter	39 mm
Lug-to-lug	43.5 mm
Thickness	9 mm
Lug width	24 mm
Water resistance	100 m
Crystal	sapphire
Case material	stainless steel
Bezel	fixed
Case back	exhibition

Movement & furniture

Type	Automatic
Caliber	Yema CMM.20 →
Power reserve	70 h
Jewels	33
Lume	Super-LumiNova
Strap / bracelet	integrated steel bracelet

On the wrist

Put this on and the first thing you notice is how little it is — 9mm thick means the Wristmaster Slim disappears under a dress shirt cuff the way almost no 39mm watch manages. The bracelet tapers well from its 24mm lug width, and once the butterfly clasp is dialled in via the micro-adjuster, it settles on the wrist with no play and no hot spots. The octagonal silhouette is assertive in the hand but surprisingly quiet in actual wear: the scalloped bezel with its six carved notches reads as architectural rather than sporty, and the irregular horizontal striations on the dial shift with the light in a way that rewards attention without demanding it.

Flip it over and the CMM.20's rhodium-plated bridges fill the sapphire caseback properly — the tungsten micro-rotor spins with no visual bulk, and Yema earns the right to show it off. The one persistent friction point: there is no hacking (seconds-stop) function, so setting the time precisely requires patience. If you can accept that, and are not hunting for a date window, the Wristmaster Slim feels priced from a different era of the market.

Bottom line

A genuinely competitive alternative to Swiss integrated sports watches at this price — the French manufacture micro-rotor, sub-9mm profile, and thoughtful bracelet finish do real work here, though the absence of a date display and no hacking function are deliberate trade-offs buyers must accept.

Highlights

In-house CMM.20 micro-rotor, 33J, 70h power reserve
9mm ultra-slim profile, 39mm case
43.5mm lug-to-lug on 24mm lugs
Exhibition caseback, screw-down crown, 100m WR
Assembled in Morteau, France

Who it's for

Collectors and daily wearers who want a genuine in-house micro-rotor in an integrated-bracelet sports watch under $3,000. The 43.5mm lug-to-lug suits small-to-medium wrists (roughly 160–175mm circumference), and the 9mm profile makes it the rare sport watch that slides comfortably under a dress shirt cuff — useful for those who want one watch to cover office and weekend.

Who should skip it

Skip it if you need a date display, expect a hacking seconds hand for easy synchronisation, or want a strap option beyond the fixed integrated bracelet.

Before you buy

Confirm the exact reference for your dial colour: yellow (76.24.03.SN.M), blue (76.24.05.SN.M), or ivory (76.24.09.SN.M)
Lug-to-lug is variously reported as 43.5mm (Yema spec, excluding first mid-link) or ~45mm on a standard end-to-end measure — check against your wrist
No hacking (seconds-stop) function — synchronising the seconds hand requires starting the watch when the actual seconds match the stopped seconds hand
Verify whether the CMM.20 (central seconds, no date) or the newer CMM.29 (small seconds subdial) better suits your preference before ordering

FAQ

Is the Wristmaster automatic or quartz?

The Wristmaster is automatic. The Yema CMM.20 winds itself from the motion of your wrist, so it needs no battery. A full wind holds roughly 70 hours, so it keeps running overnight off the wrist; left longer it stops and restarts once you wear or hand-wind it.

What movement does the Wristmaster use?

The Wristmaster is powered by the Yema CMM.20 from Yema, an automatic caliber with 33 jewels, a 70-hour power reserve, and a 28,800 bph beat rate. Being automatic, it winds from the motion of your wrist and needs no battery.

How water resistant is the Wristmaster?

The Wristmaster is rated to 100 m. That covers swimming and snorkelling, though hot water and direct high-pressure water are best avoided, and it is not intended for scuba diving. Whatever the rating, avoid operating the crown or pushers underwater, and have the gaskets checked periodically to keep it reliable.

How big does the Wristmaster wear?

At 39 mm across with a 43.5 mm lug-to-lug and 9 mm thick, the Wristmaster wears as a versatile mid-size watch. Lug-to-lug is the measurement that really decides fit, since it sets how far the case spans the wrist — 43.5 mm suits most wrists, and smaller wrists especially should check that figure.

How does the Wristmaster Slim stack up against Swiss integrated sports watches at a similar price?

It undercuts Swiss competitors at this tier while offering a genuine in-house movement and French manufacture provenance — unusual below €2,500. Finishing and bracelet articulation are competitive; the trade-off is smaller brand recognition and a less established resale market.

Is this primarily a dress watch or a sports watch?

Yema calls it an urban sports watch, and the combination of 100m water resistance, screw-down crown, and 9mm thickness lets it cover both. The octagonal case keeps it from feeling purely casual, and most owners treat it as a versatile daily driver rather than a dedicated sport piece.

Does Yema use the CMM.20 in other models, and does that affect this watch's exclusivity?

Yes — the CMM.20 caliber is shared across Yema's 'Slim' family, including the Navygraf Slim and Superman Slim. It dilutes uniqueness somewhat but also demonstrates the movement's maturity; for the Wristmaster specifically, the octagonal case design remains distinctive.

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