David,
I've been studying the contract plates for a while and have "discovered" this:
At the beginning of the war, these contract plates were made of brass. They contained the following information: contract number (starting with the previously mentioned T or C or V prefixes) and spare parts catalogue reference number.
From somewhere around 1943, the contract plates were made of sheet steel, and from more or less the same date onwards, the contract number was preceded by an additional prefix "294/
contract number". At least for the motorcycle contracts, there was also a number 23 in this prefix: "294/23/
contract number". I know from contemporary documents that this 294/23 prefix has been in use since the start of the war. But does anybody know what it stands for?
Regards,
Jan