With many thanks to G. Vögele for the magnificent photos of this amazing and rare watch!
With thanks to W. Krause for this highlight and the perfect photos!
The Junghans 683.73 is the version with Reed's regulator.
Additional information:
A watch of superlatives: Junghans J83
The discovery of a rarity: A special Junghans J83
Junghans J83; Junghans 683.71; Version with 28 Jwls
After 1964 Junghans ceased production of in-house automatic movements, helping itself with ETA movements.