What is this cap?

[bcalkins]

Anyone have a clue as to what this cap is? The shape looks Russian or Yugoslav. The skull on the front looks german or maybe white Russian? And the numbers....are they a date? Any thoughts?

Edited March 23, 2020 by bcalkins

[Bayern]

Perhaps from some Ucrainan Militia .

[chechaco1]

Surface ship

 

5-digital designation of the warhead (letter designation of the service); five, usually electricians.

3 - number of the combat post;

21-the digital designation of the combat shift, where:

2 - number of the combat shift;

1 - the serial number of the petty officer, the sailor in the combat shift.