Obverse
Crowned double-headed eagle with oval mantled shield on breast
Lettering: I B
Reverse
Denomination, date
Lettering: 3 GROSZE POLSKIE 1820
Extended information
Denomination
Currency
Metal
Copper
Krause catalog
C# 95.2
Ruler
Weight
8.9 g.
Diameter
25
mm.
Alignment
Medal ↑↑
Shape
Round
Edge
Reeded