Case diameter

15 mm watches

On the small side by modern standards; sizes like this were the norm for mid-century watches. Lug-to-lug length and case thickness matter as much as diameter for how a watch fits.

Watchfari lists 44 references with a sourced case diameter of 15.0 to 15.99 mm, spread across 4 brands and 10 families. Sourced case diameters run from 15 mm to 15.65 mm. Every sourced movement here is automatic. The most common sourced case material is stainless steel (6 of 12).