Hand-winding: Yes
and an impact-resistant sapphire crystal—a combination chosen specifically for durability in harsh environments
combining practicality and conversation-starting design in one timeless piece
Glass: Plexiglass / Acrylic
When these watches were discovered
22mm FKM (Smooth) Rubber Strap with Quick Release Feature for Fast and Easy Fitting and Removal Divers Watches Automatic Hand-winding: YesFKM1 FKM, short for Fluoroelastomer, is a high performance synthetic rubber known for its exceptional density, durability, and resistance to water, chemicals, oil, and heat. Originally developed for aerospace applications, FKM was designed to meet the stringent reliability and longevity requirements of aircraft and space missions. These qualities make FKM straps highly favored by military personnel, police officers, and professional divers, as they