SIHH 2017: Royal Oak Perpetual Calendar in Ceramic

Thomas Mudge produced the oldest known perpetual calendar in 1762. Patek Philippe followed in 1925 with a perpetual calendar wristwatch based on a ladies’ pendant watch. Breguet created the first perpetual watch with a true wristwatch movement in 1929. However, it was not until 1955 that the leap year indication was brought to a wristwatch … Continue reading SIHH 2017: Royal Oak Perpetual Calendar in Ceramic