Side by side

Massena LAB Uni-RacervsYema Skin Diver Slim CMM.20

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Uni-Racer
Massena LABUni-Racer
MSRP $3,495
Skin Diver Slim CMM.20
YemaSkin Diver Slim CMM.20
MSRP $2,117

At a glance

15 of 29 specs differ
Diameter
Uni-Racer39mm
Skin Diver Slim CMM.2047mm
Power Reserve
Uni-Racer58h
Skin Diver Slim CMM.2040h
Water Resistance
Uni-Racer50m
Skin Diver Slim CMM.20200m
MSRP
Uni-Racer$3,495
Skin Diver Slim CMM.20$2,117

Full specifications

Case

6 specs
Category
Chronograph
Diver
Diameter
39mm
47mm
Thickness
9mm
10mm
Lug-to-Lug
46mm
47mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
50m
200m

Crystal & Dial

4 specs
Crystal
Acrylic
Domed Sapphire
Crystal Shape
Domed
Flat
AR Coating
No
Inner
Dial Color
White
Steel

Movement

4 specs
Caliber
SW510 BH M Elaboré
Yema CMM.20
Type
Manual
Automatic
Power Reserve
58h
40h
Jewels
23
25

Pricing

1 specs
MSRP
$3,495
$2,117

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Massena LAB Uni-Racer

The Massena LAB Uni-Racer is praised for its refined vintage chronograph aesthetic, featuring a 39mm case with unique horizontal finishing, a GPHG-nominated hand-wound Sellita SW510 M movement, and a sector dial with a "big eye" counter. Owners and reviewers highlight its period-perfect Super-LumiNova and snailing on recessed registers, all supported by a 58-hour power reserve and 50m water resistance. On balance, owners and reviewers rate the Massena LAB Uni-Racer highly for its authentic vintage design and refined execution at its price point.

Yema Skin Diver Slim CMM.20

Owners and reviewers widely praise the Yema Skin Diver Slim CMM.20 for its balanced 39mm case, vintage aesthetic, and unique champagne dial. The proprietary CMM.20 micro-rotor movement is a notable feature, though some owners report potential QC issues including erratic timegrapher readings and second-hand stutter. The lume is described as subdued, and while some find the "dragon scale" bracelet beautiful, others consider it generic. The price point is a hurdle for some, and the stamped clasp quality is considered subpar by one reviewer, with a gap noted by an owner. The lack of hacking seconds is flagged as a drawback at its price. Overall, owners and reviewers rate the Yema Skin Diver Slim CMM.20 highly for its vintage charm and balanced wearability.

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