Mike,,could be,,,but the Batic countries had their own hallmarks..

Then there were guys like General Kornilov,,bandit or hero depending on who's side you were on. He was around 1917,18 etc. He ans some men were rumored to wear skull rings.. Where did they get them? I don't think he had them made up special. Maybe just left over stock..
All we know is this Ministry, a ring box and a pre Soviet made S&S ring!