Spring Drive U.F.A. 37mm

How it wears

Wears true to its 37 mm case size

Grand Seiko Spring Drive U.F.A. 37mm measures 44.3 mm lug-to-lug on a 37 mm case, a lug-to-lug ratio of 1.20 against a database median of 1.18. That span is shorter than 78% of the 7,413 watches in this database and shorter than 75% of the 202 Grand 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 44.3 mm (1.74 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 11.4 mm thick it sits within the typical range, thicker than 32% of the watches with a listed thickness.