Movement Automatic Caliber/movement BR-CAL.307 Base caliber ETA 2897-2 Power reserve 42 h Number of jewels 21 Case Case material Steel Case diameter 42 mm Thickness 11 mm Water resistance 10 ATM Bezel material Steel Crystal Sapphire crystal Dial Black Dial numerals Arabic numerals Bracelet/strap Bracelet material Leather Bracelet color Black Bracelet length 190 mm (115 mm / 75 mm) Bracelet thickness 3 mm Lug width 24 mm Size guide Clasp Buckle Clasp material Steel Buckle width 24 mm Functions Date Other Central seconds, Luminous hands, Power Reserve Display Description BR 03-97 Power Reserve Automatic Reference: BR0397-BL-SI/SCA Brand new, with complete documents and packaging. The official Bell&Ross international guarantee will start on the day of your purchase and it is valid worldwide. MOVEMENT BR-CAL.307. Automatic mechanical. FUNCTIONS Hours, minutes, seconds. Date. Power reserve indicator. CASE 42 mm in width. Satin-polished steel. DIAL Black. Metal applique numerals and indices. Metal skeleton Super-LumiNova-filled hour and minute hands. CRYSTAL Sapphire with anti-reflective coating. WATER-RESISTANCE 100 meters. STRAP One calfskin with hot-stamped finish and oneultra-resilient black synthetic canvas fabric. BUCKLE Pin. Satin-polished steel.