When you wear this precision timepiece, you will feel as rugged as it is. Machined in the U.S.A. out of a 2" solid block of 316L rust-free pharmaceutical steel, it complies with American aircraft construction standards. You can wear it with confidence knowing it has unyielding strength and is 100 meter waterproof, plus has Swiss precision clockwork for accuracy with a 1 mm sapphire crystal and double sealed crown. Feel fabulous knowing your watch can take as much as it gives, a fusion between Swiss precision thinking and American aerospace manufacturing.