OMF Upgrade Version The Highest Model in the Market Jaeger LeCoultre Master Series .1. Features a small seconds at the 6 o clock position, using the same 7750 chronograph movement as the genuine product, with a vibration frequency of 28,800.2. The entire watch has smooth lines, is slim and elegant, and fits comfortably with a diameter of 40mm.3. Sapphire double sided anti scratch mirror, made with Swiss standard grade sapphire crystal glass, also coated with super anti reflective film, showcasing the brand s exceptional quality.4. Upgraded butterfly double button clasp.OMF s sincere creation, welcome to appreciate and enjoy!