STAINLESS STEEL SEIKO PROSPEX AUTOMATIC DIVERS WATCH MOVEMENT CALIBER NUMBER:4R35 MOVEMENT TYPE: AUTOMATIC WITH MANUAL WINDING POWER RESERVE APPROX. 41 HOURS JEWELS: 23 STOP SECOND HAND FUNCTION DATE DISPLAY CASE MATERIAL: STAINLESS STEEL CASE SIZE: THICKNESS:12.3MM, DIAMETER:41.7MM, LUG-TO-LUG:49.5MM CRYSTAL: HARDLEX LUMIBRITE ON HANDS, INDEX(ES) AND BEZEL CLASP: THREE-FOLD CLASP WITH SECURE LOCK , PUSH BUTTON RELEASE WITH EXTENDER DISTANCE BETWEEN LUGS: 20MM WATER RESISTANCE: 200M / 660FT DIVER'S MAGNETIC RESISTANCE 4,800 A/M WEIGHT: 170.0G UNIDIRECTIONAL ROTATING BEZEL SCREW-DOWN CROWN THREE-FOLD CLASP WITH SECURE LOCK SCREW CASE BACK