Hello, these drums are difficult to prove from the period. Does your drum have M10 stamps where I pointed with the arrow?
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These drums were being used after the war and of course were being made after the war too by Sonor for example here: Hitler Youth HJ Drum by Sonor and "Hess Music" in that same thread starting at post number 15. No doubt there will be other makers too after the war.
Can you see the maker of your drum anywhere on it?
Concerns most often do not want to be remembered at the TR-period.
That is anyway my experience. Often they even dare to say they never
did produce then!