Please help to ID RAD unit

[photo-war]

Please help to ID RAD unit tat coded on sleeve patch: 223/11 or (223/31).

Thanks in advance!

Best regards,
Alexander

[Mil-Archive]

I wonder could that be '273/31'

This reference site could be useful :

http://www.feldgrau.com/WW2-German-N...hsarbeitdienst

[photo-war]

Mil-Archive many thanks! This is no 31 but 11 as I was advised.

[female service]

if it is 223/11

Lager Zell O.H.1938-1939
Gersfeld ( Rhön) 1943

named Lingg von Linggenfeld

223/31 does not exist