Hamilton American Classic Intra-Matic Auto ChronovsRGM Watches Model 455 Classic Chronographs

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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

RGM Watches Model 455 Classic Chronographs at true scale

Model 455 Classic Chronographs

Diameter

40mm

38.2mm

Thickness

14.4mm

13.9mm

lowest

Water Resistance

100m

highest

50m

Power Reserve

60h

n/a

MSRP

$2,645

lowest

$7,950

Movement

Hamilton H-31

Valjoux 7750

Case

3 specs
Diameter
40mm
38.2mm
Thickness
14.45mm
13.9mm
Water Resistance
100m
50m

Crystal & Dial

1 specs
Dial Color
White
n/a

Movement

2 specs
Caliber
Hamilton H-31
Valjoux 7750
Power Reserve
60h
0h

Pricing

1 specs
MSRP
$2,645
$7,950
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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.

RGM Watches Model 455 Classic Chronographs

Owners widely praise RGM watches for their American craftsmanship and special, unusual designs, with one owner finding the tele and tachy scales brilliantly done and perfectly colored. The 38.2mm case size contributes to a diminutive appearance for some, while others find the brand's designs mesmerizing and aspirational. Owners report that RGM watches wear well and garner compliments, with watch experts recognizing the brand's quality. On balance, owners and reviewers rate RGM Watches Model 455 Classic Chronographs highly for its unique American craftsmanship and vintage-inspired dial details.