Speedmaster Calibre 321 Professional Chronograph 42 mm

How it wears

Wears smaller than its 42 mm case suggests

Omega Speedmaster Calibre 321 Professional Chronograph 42 mm measures 47.6 mm lug-to-lug on a 42 mm case, a lug-to-lug ratio of 1.13 against a database median of 1.18. That span is longer than 59% of the 7,421 watches in this database and longer than 51% of the 487 Omega watches listed.

A flat wrist width of 53 mm (2.09 in) or more keeps it in the balanced range, and from 64 mm (2.52 in) it starts to look compact. Below 47.6 mm (1.87 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 13.39 mm thick it sits within the typical range, thicker than 69% of the watches with a listed thickness.