The Rolex Oyster Perpetual 31 reference 277200 is powered by the Calibre 2232, a self-winding mechanical movement developed and manufactured entirely by Rolex.
Core Performance Specifications The movement operates at a frequency of 28,800 vibrations per hour (4 Hz) and utilizes 31 jewels to reduce friction. It provides a power reserve of approximately 55 hours when fully wound. Rolex certifies this caliber as a Superlative Chronometer, guaranteeing a precision of -2/+2 seconds per day after casing, which exceeds standard COSC requirements. The movement features a bidirectional self-winding system via a Perpetual rotor and includes a stop-seconds mechanism for precise time setting.
