This is a copy of a German ring from the WW2 period.
These rings were common in the German army(wehrmacht) and SS units. The original ring (cantine ring) was found on the battlefields in Russia, its condition was perfect and I made a beautiful copy, which repeats the original ring in great detail. There is also a counter-relief at the skull and the 830 mark.
You can look at the photo and compare the copy (left) and the original ring (right).
It is possible to install semi-precious and precious stones in the eye sockets, see examples in the photo — for an additional fee.