Side by side

Massena LAB Uni-RacervsYema Pearldiver

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

Uni-Racer
Massena LABUni-Racer
MSRP $3,495
Pearldiver
YemaPearldiver
MSRP $491

At a glance

14 of 29 specs differ
Diameter
Uni-Racer39mm
Pearldiver38mm
Power Reserve
Uni-Racer58h
Pearldiver40h
Water Resistance
Uni-Racer50m
Pearldiver100m
MSRP
Uni-Racer$3,495
Pearldiver$491

Full specifications

Case

5 specs
Category
Chronograph
Diver
Diameter
39mm
38mm
Thickness
9mm
14mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
50m
100m

Crystal & Dial

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

Movement

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

Pricing

1 specs
MSRP
$3,495
$491

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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 Pearldiver

Owners widely praise the Yema Pearldiver's vintage aesthetic, clean dial, and sub-40mm dimensions with short lug-to-lug, noting its in-house movement and solid build quality. Accuracy figures range from dead-on at 0 seconds per day to +2 seconds per day, though some owners have reported dead-on-arrival movements requiring returns. The bracelet clasp is described by one owner as "pretty cheap." Some find the design pedestrian and lacking uniqueness, with the faux lume color noted as too dark by one commenter. Overall, owners rate the Yema Pearldiver highly for its vintage appeal and wearable dimensions at the price.

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