This is RUSSIA USSR 1925 ПЛ POLTINNIK - 50 KOPEKS, Blacksmith at anvil 0.9 SILVER PATINA

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

YES WE DO COMBINE POSTAGE