circa 1989, model 5500, serial number L317598, the signed circular silvered dial, 28mm diameter with silver coloured batons and hands and centre sweep, signed 26 jewel mechanical automatic movement calibre 1520 with liveried screw down crown, case 34mm diameter, polished bezel, verso screw down with brushed finish, interior signed and numbered 1002, to a 'Steelinox Oyster' bracelet number N2 (for February 1989), 78350 with liveried fold over claspFirst released in 1945, the Air King is currently one of the longest continuously manufactured models within the Rolex range. It is the only remaining watch in production from the original “Air Series” which included the Air Lion, Air Giant, and Air Tiger, all created to honour the RAF pilots of the Battle of Britain. The Air King is well known, and has become a highly prized collector's piece.