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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesThe Yema Skin Diver Slim CMM.20 Limited Edition pairs a 39 mm, 10 mm-thick vintage-inspired diver case with Yema’s automatic micro-rotor movement. Its specifications make it an unusually slim, mechanically distinctive option on paper; the main caveat from independent hands-on coverage is a reviewer’s concern about the hour-hand finish. Yema’s U.S. listing showed the watch at $2,290 and sold out when accessed, so that price and availability are specific to that listing and may change.
What exactly is the Skin Diver Slim CMM.20 Limited Edition?
Yema describes the watch as a modern interpretation of its 1960s skin divers. The official model is reference 12.24.99.SN.M3. Its dark grey lacquered dial, polished applied markers, luminous hands and markers, sapphire-insert bezel, and slim steel bracelet give it the familiar diver layout, while the micro-rotor calibre is its defining mechanical distinction. Yema’s official listing provides the model’s specifications.
Case, dial and bracelet specifications
| Component | Yema specification |
|---|---|
| Case diameter | 39 mm |
| Case thickness | 10 mm |
| Lug width | 20 mm |
| Case material and finish | 316L stainless steel, vertically brushed with polished bevels |
| Crystal | 2.20 mm double-domed sapphire |
| Dial and lume | Dark grey lacquer; applied polished-steel markers and hands with Super-LumiNova C3 Grade A |
| Bracelet | Brushed 316L stainless steel Scales Slim bracelet |
| Bezel | Unidirectional, with a sapphire insert |
| Crown and water resistance | Screw-down crown; 30 bar / 300 m / 990 ft, as specified by Yema |
The 39 mm diameter and stated 10 mm thickness are the key proportions to consider if you want a compact diver rather than a larger, thicker tool watch. Those are manufacturer measurements, not a guarantee of how the watch will sit on every wrist; Yema’s published specifications do not include a lug-to-lug measurement. Yema’s 300 m water-resistance figure is also a specification, not a report of independent pressure testing. Yema’s listing
What the CMM.20 micro-rotor adds
Yema specifies a Manufacture Morteau 20 calibre, a self-winding movement with a ball-bearing rotor. Its published specifications are a frequency of 28,800 A/h, a 70-hour power reserve, hours, minutes and seconds, and a stated daily rate of -3/+7 seconds. These are Yema’s figures; independent movement testing was not available in the cited coverage. Yema’s movement specifications
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- Stainless Steel case with Black Resin Band
- Black Dial with date window at 3 O'clock
- Luminous markers and hour hands; sweep second hand
- Anti-reverse bezel
- Water-resistant to 200 M (660 feet)
The micro-rotor architecture is the reason this version is mechanically distinct from a conventional automatic diver: it uses a small rotor integrated into the movement rather than a full-size rotor spanning its back. The practical appeal here is the combination Yema presents—a slim stated case profile and a long stated power reserve. The available evidence does not establish how this calibre performs over time or what its servicing costs and support arrangements are, so those are sensible questions to put to Yema before buying.
What independent hands-on coverage found
Fratello reported that the case and bracelet were nicely finished, but said inspection with a loupe revealed questionable finishing on the hour hand. That is one reviewer’s observation, not confirmation of a production defect or a claim that every example has the same issue. It is the most specific independent finishing criticism in the available coverage. Fratello’s hands-on review
Rank #2
- The waterproof level of this watch has reached 10 ATM waterproof, which can work normally at a depth of 100 meters (330ft) underwater. It is not only suitable for wearing in water activities such as swimming, diving, snorkeling, surfing, rowing, water skiing, but also suitable for wearing in daily life and outdoor sports, such as jogging, hiking, climbing, cycling, etc.
- The built-in stopwatch and timer function of the watch can meet the precise timing needs of exercise and sports competitions.
- The dual time zone display function will make your trips more convenient; 12/24 hour format display can meet the time reading habits of different people.
- Support multiple useful functions, such as: alarm clock, hourly chime, calendar and back light.
- The watch battery is replaceable. If you find that the watch is not working or the text on the display is not clear, please replace the watch battery in time.
Limited edition, price and availability
A France Horlogerie newsletter dated June 27, 2024 reported that the launch was limited to 500 examples. The official listing excerpt does not independently confirm the edition quantity, so treat 500 as France Horlogerie’s report rather than a separately verified manufacturer figure. France Horlogerie, June 27, 2024
When accessed, Yema Watches USA listed reference 12.24.99.SN.M3 at $2,290 and marked it “SOLD OUT.” That is a time-sensitive snapshot of the U.S. store, not a current global price or an indication of availability through other retailers. Yema Watches USA listing
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Rank #3
- 330 ft. (100 M) water resistance. In general, suitable for recreational surfing, swimming, snorkeling, sailing and water sports.
- 12/24-hour timekeeping, 43 mm resin case with mineral dial window, Japanese quartz movement; Analog: 3 hands (hour, minute, second)
- Case / bezel material: Resin; Rotating bezel
- Day and date display at 3 o’clock
- Analog display, molded resin band with buckle closure; Accuracy: ±20 seconds per month
Is it a better pick than Yema’s less expensive dive watches?
The CMM.20 version’s strongest case is its combination of restrained dimensions and a micro-rotor movement with a manufacturer-stated 70-hour reserve. Whether that warrants choosing it over a less expensive Yema diver depends on how much value you place on this movement architecture and the slim profile, alongside the specific dial, bezel and bracelet design.
The available comparison evidence does not provide current specifications or prices for other Yema divers, so a meaningful model-by-model value ranking is not possible here. Compare the exact alternatives by case size and thickness, movement and reserve, water-resistance specification, bracelet or strap setup, current local price and availability, and any independent finishing observations. The 20 mm lug width makes straps a possible alternative, but no particular third-party strap fit has been verified for this watch.
Quick Recap
Best Value
- Iconic Promaster watches with advanced functions designed to venture to the deepest depths.
- 3 Hand, Date
- Silver-Tone Stainless Steel
- Luminous Hands and Markers and Mineral Crystal
- Sustainably powered by any light, with our Eco-Drive technology this watch never needs a battery. ISO Certified, 200M Water Resistant and 5 Year Limited Warranty
Rank #4
- DIVER-INSPIRED DESIGN — Inspired by the sea, the MDV-106B is styled after classic dive watches and delivers 200-meter water resistance at an unbeatable price point. The black resin band and stainless steel case give it a classic look, while the anti-reverse rotary bezel adds authentic dive-watch character.
- STAINLESS STEEL CASE WITH SCREW-LOCK CROWN & CASEBACK — The MDV-106B features a stainless steel case and a reliable screw-lock crown for enhanced water resistance protection. Screw-down crown and screw-lock caseback work together to keep the movement sealed and secure during water activities — a construction standard found on dive watches far above this price range.
- LARGE FLUORESCENT HANDS & INDICES FOR INSTANT READABILITY — The dial features hands and hour indices with large fluorescent areas for easy reading in low-light and underwater conditions. The clean 3-hand analog layout with date display at 3 o'clock keeps the dial uncluttered and immediately legible at a glance.
- 44MM STAINLESS STEEL CASE | 22MM LUG WIDTH | MINERAL GLASS — The case measures 44mm in diameter, 12mm in height, with a 49mm lug-to-lug length and a standard 22mm lug width — making strap upgrades effortless with a vast range of aftermarket options. Mineral glass protects the dial from everyday scratches and impacts.
- 3-YEAR BATTERY & 200M WATER RESISTANCE — Powered by an SR626SW battery with an approximate 3-year life, the case measures 49.5 × 46.3 × 12.1mm and weighs 92 grams. At 200 meters of water resistance, the Duro is versatile and suitable for all situations — whether in the water, hiking, running, or at the office.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
