Side by side

Hamilton American Classic Intra-Matic Auto ChronovsSeiko Prospex SPEEDTIMER Mechanical Chronograph

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.

Seiko Prospex SPEEDTIMER Mechanical Chronograph

The Seiko Prospex SPEEDTIMER Mechanical Chronograph is praised for its handsome, heritage-inspired design with a clean, balanced dial and an external tachymeter bezel. Reviewers highlight the upgraded case and bracelet, noting improved comfort and good value for a well-designed chronograph with an in-house movement. The caliber 8R48 movement features a vertical clutch and column wheel with MEMS technology for durability and precision. Points to consider include the 4:30 date window and a 14.6mm thickness, while the 45-hour power reserve is noted as an area for potential improvement. On balance, reviewers find the Seiko Prospex SPEEDTIMER Mechanical Chronograph to be a solid offering with good value, particularly for its design and in-house movement.

At a glance

11 of 29 specs differ
Diameter
American Classic Intra-Matic Auto Chrono40mm
Prospex SPEEDTIMER Mechanical Chronograph42mm
Power Reserve
American Classic Intra-Matic Auto Chrono60h
Prospex SPEEDTIMER Mechanical Chronograph45h
Water Resistance
American Classic Intra-Matic Auto Chrono100m
Prospex SPEEDTIMER Mechanical Chronograph100m
MSRP
American Classic Intra-Matic Auto Chrono$2,645
Prospex SPEEDTIMER Mechanical Chronograph$2,500

Full specifications

Case

3 specs
Diameter
40mm
42mm
Thickness
14.45mm
14.6mm
Lug-to-Lug
0mm
49.5mm

Crystal & Dial

4 specs
Crystal Shape
Curved
AR Coating
Anti-reflective coating on inner surface
Dial Color
White
Lume
None
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
H-31
8R48
Power Reserve
60h
45h
Jewels
0
34

Pricing

1 specs
MSRP
$2,645
$2,500
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