1926 Soviet Union USSR Coin Silver Ag Coinage Rare 1 Poltinnik Y#89 #SU755. The Soviet Union, [d] officially the Union of Soviet Socialist Republics[e] (USSR), [f] was a socialist state that spanned Europe and Asia during its existence from 1922 to 1991. It was nominally a federal union of multiple national republics;[g] in practice its […]