Case diameter

18 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 65 references with a sourced case diameter of 18.0 to 18.99 mm, spread across 11 brands and 18 families. Sourced case diameters run from 18 mm to 18.5 mm. By movement type: 17 quartz and 2 solar. The most common sourced case material is stainless steel (15 of 38).