Speedmaster 57 Co-Axial Master Chronometer Chronograph 40 5 mm

How it wears

Wears larger than its 40.5 mm case suggests

Omega Speedmaster 57 Co-Axial Master Chronometer Chronograph 40 5 mm measures 49.64 mm lug-to-lug on a 40.5 mm case, a lug-to-lug ratio of 1.23 against a database median of 1.18. That span is longer than 80% of the 7,413 watches in this database and longer than 75% of the 487 Omega 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 49.64 mm (1.95 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 12.99 mm thick it sits within the typical range, thicker than 62% of the watches with a listed thickness.