Automatic mechanical movement Tudor Calibre T601 based on ETA 2824 contains 25 jewels beating at 28800 vph offers approximately 38 hours power reserve silver tone stainless steel case black leather strap fixed bezel of same material sapphire crystal protects analog display with diamond hour markers and Roman numeral minute markers date function shown through aperture at the three o'clock position includes hours minutes seconds large central second hand solid case back round shape measures 36 mm diameter screw down winding crown fold over clasp equipped with safety release mechanism water resistant up to 100 meters suitable for swimming functions include display of hour minute second and date luxury watch design Swiss made origin item variations listed