I had to resize one and only pic available... Now I am trying to get more details about the place and better pics.. Probably it was Russian camp and this was personal collection of Russian soldier? In their camps you could find wonderfull things...
All those skulls looks like legion of immortals, threatening...
Here are two cuts from original pic.
Hanswurst: being from another colleague these rings were for sure found at totally different part of CZ...

Cut_1.JPG (72.05 KB, 510 downloads)