Hamilton American Classic Intra-Matic Auto ChronovsOmega Speedmaster Moonwatch Professional Co Axial Master Chronometer Chronograph 42mm

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Hamilton American Classic Intra-Matic Auto Chrono at true scale

American Classic Intra-Matic Auto Chrono

Omega Speedmaster Moonwatch Professional Co Axial Master Chronometer Chronograph 42mm at true scale

Speedmaster Moonwatch Professional Co Axial Master Chronometer Chronograph 42mm

Diameter

40mm

42mm

Lug-to-Lug

n/a

47.5mm

Thickness

14.4mm

13.2mm

lowest

Water Resistance

100m

highest

50m

Power Reserve

60h

highest

50h

MSRP

$2,645

lowest

$7,400

Movement

Hamilton H-31

Omega 3861

Case

5 specs
Diameter
40mm
42mm
Thickness
14.45mm
13.18mm
Lug-to-Lug
n/a
47.5mm
Finish
n/a
Steel
Water Resistance
100m
50m

Crystal & Dial

2 specs
Crystal Shape
n/a
Domed
Dial Color
White
Black

Movement

6 specs
Caliber
Hamilton H-31
Omega 3861
Type
Automatic
Manual
Power Reserve
60h
50h
Hacking
No
Yes
Hand-winding
No
Yes
Complications
None
Chronograph

Pricing

1 specs
MSRP
$2,645
$7,400
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Reviews

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 attractive panda dial, retro design, and value, with many noting its historical significance and ability to garner compliments. Reviewers and owners alike highlight its clean, athletic aesthetic and vintage charm, with some finding it wears well and fits comfortably under dress shirts, even on smaller wrists. However, multiple sources flag its substantial thickness, ranging from 14.35mm to 14.7mm, and one owner noted the H-31 movement's rotor felt unusually spinny and the date-set button recessed. Accuracy figures vary, with one owner reporting +8 seconds per day and another +3 seconds per day. The included leather strap is frequently described as showing creasing easily or being merely utilitarian, leading some owners to explore aftermarket bracelet options.

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.

Omega Speedmaster Moonwatch Professional Co Axial Master Chronometer Chronograph 42mm

The Omega Speedmaster Moonwatch Professional Co Axial Master Chronometer Chronograph 42mm is widely praised for its significant movement upgrade to the manual-wind Caliber 3861, its improved bracelet, and excellent on-wrist comfort. Owners appreciate its well-finished movement and overall build quality, with some finding it a relative bargain. Accuracy is reported as excellent, with one reviewer noting the watch gained only two seconds over a week. However, some find the Hesalite crystal scratches easily, and the chronograph seconds hand does not always align perfectly. A portion of owners and reviewers consider the Omega Speedmaster Moonwatch Professional Co Axial Master Chronometer Chronograph 42mm overrated and overpriced, citing its lack of applied markers, mediocre lume, and manual-winding nature as drawbacks for its price point, while others defend it based on its historical significance.

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