Movements with the label "Wehrmachtswerk" were from several manufacturers (AS 1130 AS 1560; Unitas 6310N; Girard Perregaux; Precimax) produced. Initially, these movements met the requirements imposed by the military in the 30s and 40s of movements. This should have 13''' (29,33mm) diameters and were for that time movements quite large in order to ensure better accuracy and sturdiness.
In addition, the dimensions for the assembly into the case and the dial had to have the same dimensions. Built-in diameter, bearing surface height and positions of the dial-feet had to be the same.
In the original meaning of the term "Wehrmacht" described the armed forces of a country and was also used in other German-speaking countries.
In the designation of the movement as a "Wehrmachtswerk " Junghans was trying to emphasize the quality and has nothing to do with the German "Wehrmacht".
Watches where the dial is provided with the term "Wehrmachtswerk" are not to be confused with service watches.
Junghans brought watches to the market with the imprint "Wehrmachtswerk" on the dial that contain other movements: i.e. Junghans Wehrmachtswerk AS 1130, or Unitas 6310.
Another example of a built-up as a "Wehrmachtswerk" caliber: The AS 1130 (Adolph Schild, Grenchen) from a 782 S PARA service watch.
The typical number of service watches is only be guessed under the "Antimagnetic" on the back cover.