THIS IS RUSSIA USSR 1924 ПЛ POLTINNIK - 50 KOPEKS, 0.900 SILVER Top GRADE Lustre

Metal     Silver (.900)
Weight     10 g
Diameter     26.67 mm
Thickness     2.15 mm
Shape     Round
Orientation     Medal alignment ↑↑
Demonetized     yes
References     Y# 89.1, Y# 89.2