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Hamilton American Classic Intra-Matic Auto Chrono
Case
- Diameter
- 40mm
- Thickness
- 14.45mm
- Lug width
- 20mm
- Material
- Stainless Steel
- Water resistance
- 100m
Crystal & dial
- Crystal
- Sapphire
- Dial colour
- White
Movement
- Caliber
- Hamilton H-31
- Type
- Automatic
- Power reserve
- 60h
- Hacking
- No
- Hand-winding
- No
- Complications
- Time only
Hamilton
Hamilton's automatic chronograph caliber, based on the Valjoux/ETA 7750, running at 28,800 vph with the base 7750's power reserve of around 44 hours. It powers Hamilton chronographs such as the Intra-Matic Auto Chrono and Khaki Aviation lines (the separate H-21 caliber is the 60-hour extended-reserve version).
Design language
- Case shape
- round
- Dial style
- matte
- Sub-dials
- 2
- Bezel
- tachymeter
- Bracelet
- lug-attached
- Hands
- baton
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American Classic Intra-Matic Auto Chrono collection · 23 watches
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7 colorways
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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.
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