Autavia 2446

The first Autavia: a three-register, 12-hour chronographChronographA watch function for starting, stopping and resetting an elapsed-time measurement independently of the ordinary time display. on the Valjoux 72 in a round screw-back case with a rotating bezelBezelThe frame surrounding the crystal at the front of a watch., launched in 1962 as Heuer’s first named chronographChronographA watch function for starting, stopping and resetting an elapsed-time measurement independently of the ordinary time display. line and its first wrist with a turning . Suffix letters on the reference record the (M minutes, H hours, T ). Collectors split production by case (first, transitional and second-execution screw-back cases) and by four dial executions; a GMT version followed about 1968.