Male Wristwatch Sports Watch AP Wrist Watch Royal Oak Series 15451 Automatic Machinery 37mm Gauge Unisex Suitable for Both Men and Women to Wear Full Set

ASTRONOMY:Inspired by the Vallée de Joux's clear night sky, generations of watchmakers at AP have crafted re­fined timepieces capturing astronomical cycles. CHIMING:Over the centuries, watchmakers have followed their dream to create refined chiming watches with the sound quality of musical instruments. TOURBILLON AND SPECIAL ESCAPEMENTS:Building on traditions,AP watchmakers have crafted mechanisms with new functionality,greater reliability and optimal efficiency with each generation. OUR CHRONOGRAPHS:Chronographs were developed in the 19th century with the increasing necessity to measure short periods of time and performances, such as horse races. GRANDES COMPLICATIONS:To be considered a Grande Complication, a watch must include a minute repeater, a split-seconds chronograph and a perpetual calendar..syi