Prospex Mechanical 39.5mm

How it wears

Wears smaller than its 39.5 mm case suggests

Seiko Prospex Mechanical 39.5mm measures 44.5 mm lug-to-lug on a 39.5 mm case, a lug-to-lug ratio of 1.13 against a database median of 1.18. That span is shorter than 75% of the 7,413 watches in this database and shorter than 84% of the 390 Seiko watches listed.

A flat wrist width of 50 mm (1.97 in) or more keeps it in the balanced range, and from 60 mm (2.36 in) it starts to look compact. Below 44.5 mm (1.75 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 mm thick it sits within the typical range, thicker than 45% of the watches with a listed thickness.