I recently saw a DJ achievement badge like this (it might actually have been one of those two - not sure) given the thumbs up on a German forum as being a very early example. As usual, qualification of that statement was neither requested nor offered. My initial thought was: hang on, the DJ badge was introduced at the end of Sept 1935 and there was obviously a period of time where qualification and further admin took place before badges began to be issued to qualified boys. That puts the badge, not that it wasn't already, firmly into RZM territory yet these don't have any marks at all? Nah...