Side by side

Zelos Hammerhead (Tantalum LE)vsMassena LAB Uni-Racer

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

Hammerhead (Tantalum LE)
ZelosHammerhead (Tantalum LE)
MSRP $1,499
Uni-Racer
Massena LABUni-Racer
MSRP $3,495

At a glance

16 of 29 specs differ
Diameter
Hammerhead (Tantalum LE)44mm
Uni-Racer39mm
Power Reserve
Hammerhead (Tantalum LE)40h
Uni-Racer58h
Water Resistance
Hammerhead (Tantalum LE)300m
Uni-Racer50m
MSRP
Hammerhead (Tantalum LE)$1,499
Uni-Racer$3,495

Full specifications

Case

7 specs
Category
Diver
Chronograph
Diameter
44mm
39mm
Thickness
13mm
9mm
Lug-to-Lug
44mm
46mm
Lug Width
22mm
20mm
Material
Titanium
Stainless Steel
Water Resistance
300m
50m

Crystal & Dial

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

Movement

4 specs
Caliber
Seiko NH35
SW510 BH M Elaboré
Type
Automatic
Manual
Power Reserve
40h
58h
Jewels
25
23

Pricing

1 specs
MSRP
$1,499
$3,495

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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.

Zelos Hammerhead (Tantalum LE)

The Zelos Hammerhead (Tantalum LE) features a forged carbon dial and bezel insert with infused lume. On balance, owners and reviewers rate the Zelos Hammerhead (Tantalum LE) highly for its unique material composition and substantial feel.

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.

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