Side by side

Massena LAB Uni-RacervsYema Superman Steel CMM.10

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

Uni-Racer
Massena LABUni-Racer
MSRP $3,495
Superman Steel CMM.10
YemaSuperman Steel CMM.10
MSRP $1,890

At a glance

15 of 29 specs differ
Diameter
Uni-Racer39mm
Superman Steel CMM.1039mm
Power Reserve
Uni-Racer58h
Superman Steel CMM.1040h
Water Resistance
Uni-Racer50m
Superman Steel CMM.10300m
MSRP
Uni-Racer$3,495
Superman Steel CMM.10$1,890

Full specifications

Case

6 specs
Category
Chronograph
Diver
Thickness
9mm
11.3mm
Lug-to-Lug
46mm
Lug Width
20mm
19mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
50m
300m

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.10
Type
Manual
Automatic
Power Reserve
58h
40h
Jewels
23
25

Pricing

1 specs
MSRP
$3,495
$1,890

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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 Superman Steel CMM.10

Owners widely praise the Yema Superman Steel CMM.10 for its refined casework, including polished lug bevels and an elegant crown guard, and its comfortable 39mm x 10.5mm dimensions. The glossy black lacquer dial and bezel insert are noted for adding depth, and the in-house CMM.10 movement is reported to be accurate, with one owner observing a loss of only 2 seconds over 2 days. The scales bracelet is described as gorgeous and nearly invisible on the wrist, though some find its polished center links too flashy. One reviewer flagged the signature bezel lock mechanism as flimsy and inconvenient. The CMM.10 automatic movement offers a 70-hour power reserve and is regulated to within +5/-3 seconds per day. On balance, owners and reviewers rate the Yema Superman Steel CMM.10 highly for its refined finishing and comfortable wearability at its price point.

From video reviewers

The Yema Steel features an in-house movement with a micro-rotor, one of the most beautiful at this price point. The watch's clasp feels a bit thin, which is a notable drawback. Reviewers disagree on the movement's power reserve, with one reviewer noting a 42-hour reserve and the other not mentioning power reserve at all.

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