this is a beautiful Heuer Autavia GMT, reference 2446C, from the 1960s. The Valjoux 72 powered racing chronograph with GMT function features an unpolished 40mm steelcase that shows several signs of wearing from the past decades (serial 145xxx) . Pushers, crown and of course the caseback, signed with the three lines are the original ones. The inverted panda dial and the complete handset are also still in full original condition, featuring the old tritium lume from the 1960s. the original nos heuer bezel is in unscratched and mint condition withbeautifully powerful colors. the movement was checked and is running exactly and strongly and won´t be in the need for a service in the upcoming years. The Autavia GMT comes with two leatherbands. A brown one with a Heuer Service buckle and a black one.