
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).
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Jazzmaster Performer Auto chrono collection · 26 watches












6 colorways
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The community take
The Hamilton Jazzmaster Performer Auto chrono is praised as a good entry-level Swiss watch with desirable features and a reputable brand name, offering a sporty take on the Jazzmaster line with a 42mm case and a three-register layout. Owners note its 60-hour power reserve from the H-31 movement and find it a durable, stylish choice for daily wear. Some community members consider it a "sleeper model" with a stealthily beautiful design. However, some reviewers question its design originality, seeing similarities to other chronographs, and one commenter dislikes its 43mm case and long lug-to-lug measurement. The strap is described as stiff out of the box and on the shorter side. One owner questioned if the bezel was functional, and another felt it might be small and pricey for its specifications. Overall, owners and reviewers rate the Hamilton Jazzmaster Performer Auto chrono well for its value as an entry-level Swiss chronograph with desirable features and a reputable brand name.
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