This photo has come from Germany (ebay) I don't know if it was taken there,I think its a 1940 model but has been fitted with panniers and pillion seat/footrests kit,as the pillion foot rest looks the bolt on type,the sign in the back ground says DANGER EXPLOSIVES on the top half but cant make out what the bottom half says. 
Look what I have here.
Henk
email (option): ahum@quicknet.nl