Here is the breech of mine Bill. Close to a kissin' cousin of yours.
I think that single shot EL 24s for police use would have been police accepted. But until the time I even see one, much less acquire one, I will be happy with a commercial issue as the police ones would have been commercially marked too.
However, as I pointed out in my chapter on police trainers for the BOOK, I think EL 24 acquisition was confined to the early production of these tubes. The police switched to the DSM 34 and other trainers and relegated the EL 24 to a secondary status, and would not have been procuring them by the time E/N was instituted.
I have seen in auctions some of these single shot units in wood retaining cases but they are marked Erma/Dachau. These are post-WWII models aren't they? Does anyone know for how long they produced them in West Germany?