Jazzmaster Open Heart 40mm

How it wears

Wears larger than its 40 mm case suggests

Hamilton Jazzmaster Open Heart 40mm measures 50 mm lug-to-lug on a 40 mm case, a lug-to-lug ratio of 1.25 against a database median of 1.18. That span is longer than 82% of the 7,421 watches in this database and longer than 65% of the 80 Hamilton watches listed.

A flat wrist width of 56 mm (2.20 in) or more keeps it in the balanced range, and from 67 mm (2.64 in) it starts to look compact. Below 50 mm (1.97 in) the lugs are likely to overhang the wrist. Flat wrist width is measured straight across the top of the wrist, not around it.

At 11 mm thick it sits within the typical range, thicker than 26% of the watches with a listed thickness.