Great to find you and a big thank you to you all, in advance!
I find forums the place to go when you have tried all the research you can so here I am.
I have just found a couple of stamps on the inside of a very old German cash register, it appears to have been used last in 1939.
Can anybody identify the stamps please?
The writing I find on them is as follows:
Solidaritat Eint Die Arbeiterklasse
Solidaritat Betreut Die Arbeitsveteranen