Scurfa M.S.21 Diver One Limited EditionvsYema Superman Slim CMM.20

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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

M.S.21 Diver One Limited Edition

Superman Slim CMM.20
Diameter
40mm
39mm
Lug-to-Lug
47.7mm
n/a
Thickness
14.4mm
9.9mm
lowest
Water Resistance
500m
highest
300m
MSRP
$264
lowest
$2,372
Movement
Ronda 715SM
Yema CMM.20
Case
5 specsCrystal & Dial
2 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners and reviewers praise the Scurfa M.S.21 Diver One Limited Edition for its toolish, affordable titanium construction, featuring a fully brushed case, drilled lugs, and a 120-click bezel. The watch is lauded for its excellent lume, with one owner calling it the best they have seen, and the titanium case is highlighted as a game-changer for its warmth and lightweight feel. The Ronda 715SM quartz movement is noted as being the same caliber found in more expensive watches from brands like Tissot and Marathon. Overall, owners and reviewers rate the Scurfa M.S.21 Diver One Limited Edition highly for its exceptional value and practical, robust design.
Owners and reviewers praise the Yema Superman Slim CMM.20 for its appealing retro design, balanced 39mm case, and in-house CMM.20 micro-rotor movement, with some finding the fish scale bracelet attractive. Concerns exist regarding its $2500/€2,490 MSRP, with some owners questioning its value and noting the potential for QC issues or a "jittery" seconds hand attributed to the new movement. The bracelet's articulation and stamped clasp draw criticism, though some owners report it improves with wear. Overall, owners and reviewers appreciate the Yema Superman Slim CMM.20's vintage styling and unique micro-rotor movement, but its value proposition and some finishing details are points of contention.
The upgraded CMM.20 micro-rotor movement is a significant enhancement. Reviewers noted the slim profile and redesigned case. One reviewer indicated a significant flaw was discussed, but the nature of this imperfection was not specified.
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