Hamilton H78215553 Khaki Navy Pioneer AutoProduct Overview The Navy style is not limited to men's models. Hamilton has adopted a 36mm compact case for the Khaki Navy Pioneer, inspired by models from the 1940s. This model evokes Hamilton's history of development for the U. S. Navy, remaining true to the original while being a modern timepiece. Specifications Product Number H78215553 Caliber H 10 Collection Khaki Navy Movement Automatic Case Size 36mm Thickness (mm) 10. 75 Dial Color Silver