The Calibre 8700\'s sporty case adds an edge to its traditional design. Key features to this retrograde perpetual calendar include month-day-date, alarm, dual time, 12/24 hour time and a non-reflective crystal. Other details for this stainless steel rose gold-tone watch include 42mm screw-back case, leather strap with buckle, and 100M WR. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number E870.