Once again there is a watch with the M.A.N. on it´s case-back.
The watch also shows the imprint K 71 under the balance. It is often assumed that the Junghans 620.50 was produced from 1972nd. The embossing shows that the production already started at the end of the year 1971 (K71 = October 1971).
The Junghans 620.50 is like the Junghans 620.00 (found here: Junghans 620.00 ) the basic movement of the 620er series. The Junghans 620.00 was produced as early as the 1967th.
Another example of a Junghans with the caliber 620.50 with a case from Rodi & Wienenberger (RoWi), a case-manufacturer from Pforzheim:
Auch mit Diehl gelabelte Uhren können das Junghans 620.50 beinhalten.