(Werksicherheitsdienst) got standardized rank insignia in 1937. Later change of name to Werkschutzpolizei did not affect the rank insignia.
* Wachmann-Anwärter = no rank insignia
* Wachmann = 1 Chevron on upper left arm
* Oberwachmann = 2 Chevrons
* Wachleiter = 3 Chevrons
* Oberwachleiter = 1 Stripe on left sleeve
Below is an "Oberwachleiter" at the Focke Wulf Flugzeugwerke. Standardized insignia in cap and on upper left arm. Collar patches with the logo of Focke Wulf.
Night watchmen and factory guards