Very nice ring by Poznan Rytosztuka in a very rare cut on the market.
Patina.
The ring bears the punch of the RYT factory, the hallmark of the E3 branch and the national hallmark for sterling silver 3 (.800) from the Cracow Assay Office used in 1963-1986.
Preservation condition of the item very good.
Silver .800, size 16, product weight 3.8 g.