Mark XX Mercedes-AMG Petronas Formula One Team 40mm

How it wears

Wears larger than its 40 mm case suggests

IWC Mark XX Mercedes-AMG Petronas Formula One Team 40mm measures 49 mm lug-to-lug on a 40 mm case, a lug-to-lug ratio of 1.23 against a database median of 1.18. That span is longer than 73% of the 7,413 watches in this database and longer than 36% of the 42 IWC watches listed.

A flat wrist width of 55 mm (2.17 in) or more keeps it in the balanced range, and from 66 mm (2.60 in) it starts to look compact. Below 49 mm (1.93 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 10.6 mm thick it is on the slim side, thinner than 80% of the watches with a listed thickness.