Automatic - self-winding mechancial movement beating at 288000 vibrations per hour. Monocrystalline silicone balance-spring power reserve up to 45 hours. Stainless steel bracelet case and bezel. White matte dial with blue hands and Roman numerals. Day of the month at the 3 position. Triple safety folding clasp and push-piece opening. Sapphire crystal scratch resistant dial window with anti-reflective coating. Transparent caseback with sapphire crystal. Chronometer Officially certified. Lug width: 15mm. Case size: 30mm. Water resistant to 30 M.