Sport Spring Drive 40.5mm

How it wears

Wears true to its 40.5 mm case size

Grand Seiko Sport Spring Drive 40.5mm measures 48.7 mm lug-to-lug on a 40.5 mm case, a lug-to-lug ratio of 1.20 against a database median of 1.18. That span is longer than 72% of the 7,421 watches in this database and longer than 79% of the 202 Grand Seiko watches listed.

A flat wrist width of 55 mm (2.17 in) or more keeps it in the balanced range, and from 65 mm (2.56 in) it starts to look compact. Below 48.7 mm (1.92 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 14.7 mm thick it is on the thicker side, thicker than 89% of the watches with a listed thickness.