Side by side

Hamilton American Classic Intra-Matic Auto ChronovsMassena LAB Uni-Racer

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

What people say

Owners + reviewers, side by side

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

Hamilton American Classic Intra-Matic Auto Chrono

Owners widely praise the Hamilton American Classic Intra-Matic Auto Chrono for its historically significant retro design, clean panda dial, and value, with many noting its comfortable wearability and how it garners compliments. Reviewers and owners alike highlight its attractive dial with well-placed sub-registers and polished indices, evoking a vintage charm. Some owners find the 14mm+ case thickness substantial, though others note it wears smaller than expected and fits under shirt cuffs. The H-31 movement's rotor is described as spinny by one owner, and accuracy figures range from +3 to +8 seconds per day, with one owner noting the OEM strap is utilitarian. On balance, owners and reviewers rate the Hamilton American Classic Intra-Matic Auto Chrono highly for its vintage aesthetic and value proposition.

From video reviewers

The panda dial's contrasting subdials are a notable strength. The bracelet clasp is considered less refined than the rest of the watch.

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.

At a glance

12 of 29 specs differ
Diameter
American Classic Intra-Matic Auto Chrono40mm
Uni-Racer39mm
Power Reserve
American Classic Intra-Matic Auto Chrono60h
Uni-Racer58h
Water Resistance
American Classic Intra-Matic Auto Chrono100m
Uni-Racer50m
MSRP
American Classic Intra-Matic Auto Chrono$2,645
Uni-Racer$3,495

Full specifications

Case

4 specs
Diameter
40mm
39mm
Thickness
14.45mm
9mm
Lug Width
20mm
0mm
Water Resistance
100m
50m

Crystal & Dial

3 specs
Crystal
Sapphire
Acrylic
Crystal Shape
Domed
AR Coating
No

Movement

4 specs
Caliber
Hamilton H-31
Sellita SW510
Type
Automatic
Manual
Power Reserve
60h
58h
Jewels
0
23

Pricing

1 specs
MSRP
$2,645
$3,495
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