The German attack on the "Eismeerfront" 1941-1942.
Looking at the archives and the findspot the "Gebirgsjaeger" probably lost the ring while travelling on "Heimaturlaub" in 1943. The ring was found along with several other items in the "Entlausungsdorf" area of the German camp.
Here are a few other finds from today.
A Wehrmacht medical tube containing "Salisylsalbe 2%"
Bakelite drinking cup from a German "Feldflasche".
German makers mark on the cup.
Mystery item with thread inside the green cover... could it be part of an ornate fountain pen?
German cigarette lighter.
Makers mark DRGM for "Deutsches Reichsgebrauhsmuster".