German fuze??? Please Help

[kefkef10]

I have purchased this base fuze, but I'm having trouble identifing it.
I think it is a German Bd.Z., but I don't no for sure and don't know which one.
At the bottom you see the letters DOV, but it's not the Bd.Z DOV from the 15 cm rocket.

Please help me.~~~~~

 

[kefkef10]

Does anybody know it?

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[kefkef10]

Anybody?

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