Vintage New Old Stock Divers Wristwatch Cases x 50. Each case measures 37mm across, or 40mm including the crown. The lugs are 18mm (17.68). The bezel rotates.  The caseback reads "Tested At 6ATM - Waterproof - Stainless Steel Back - Antimagnetic - Shock Resistant - Calendar". Unused NOS divers cases x 50