ED HEUER Co. Chronograph Calendar Date Valjoux 7734 Black Dial PVD Coating Case Vintage Swiss Made Movement Manual winding Caliber/movement 7734 Number of jewels 17 Case Case material Steel Case diameter 41 x 43 mm Thickness 14 mm Bezel material Steel Crystal Mineral Glass Dial Black Bracelet/strap Bracelet material Leather Bracelet color Black Lug width 20 mm Clasp Buckle Clasp material Steel Functions Chronograph, Date, Tachymeter