The heart of the timepiece is a precise quartz movement

originated in 1937

STRAPS - Leather strap

Arabic numerals Fold over clasp with safety release

with a sparkling wink

Ball Engineer M Marvelight (40mm) Men's Blue Watch Feature_Open Heart The heart of the timepieceWEIGHT Approx. 145g MOVEMENT Automatic BALL Manufacture caliber RRM7309 C Chronometer certified COSC 80 hours Power Reserve, 28,800vph SIZE (CASE) 40mm, height 13. 4mm WATER RESISTANCE 100m 330ft ANTI MAGNETISM 4,800A m MICRO GAS TUBES 17 (40mm) or 15 (43mm) micro gas tubes on hour, minute and second hands and dial for night reading capability FUNCTIONS Hours, minutes, sweep seconds and date 5,000Gs shock resistance CASE MATERIAL Stainless steel