OMF Upgrade Version The Highest Model in the Market Jaeger LeCoultre Master Series .1. Features a small second at the 6 o clock position, consistent with the genuine product, equipped with a 7750 chronograph movement, with a vibration frequency of 28800.2. The entire watch boasts smooth lines, is slim and elegant, and fits comfortably with a case diameter of 40mm.3. Sapphire dual layer anti scratch crystal mirror, made from Swiss standard grade blue crystal glass, also coated with super anti reflective coating, showcasing the brand s exceptional quality.4. Upgraded butterfly double push button clasp.OMF s heartfelt creation, welcome to appreciate and enjoy!