The movement shown above is produced after 1936 because the escape wheel cock is not separat, but before 1949/50 as from this time the shock absorber has been installed.
Often the movements were marked on the dial side of the movement with a combination of letter and number/numbers that indicate the production time. The other shwon watch as an example: E8, ie May 1938 or 1948
Again, I find it difficult in some caliber allocation. With the above list I tried to provide some clarity on the different caliber and their designations.
The movements were produced at the same time with or without divided wheel bridge. There are versions with 7, 11, 13, 15, 16 and 17 jewels.
There's caliber Junghans J80 with various imprints on the bridge: J80S; J80M (was probably Meister).