Initially released in 1945 the Air-King was part of the Rolex Air Series - a collection of watches inspired by aviation during World War II. The Air-King is the only model from the collection still in production making it ultra-rare and highly collectible. The Air-King watch features automatic movement a stainless steel 36mm Oyster case with a discontinued engine-turned bezel and scratch-resistant genuine sapphire crystal a silver dial with raised index hour markers finished with an Oyster bracelet and Oysterclasp closure. Includes papers and a branded box. Serial number X56xxxx. Wrist measures 8-11""