Obverse
Portrait of the Queen Elizabeth II in the field of the coin.
Lettering: ELIZABETH II
AUSTRALIA 1991
RDM
Reverse
Duckbill Platypus.
Lettering: 20
SD
Extended information
Year
Denomination
Currency
Metal
Krause catalog
KM# 82a
Ruler
Weight
13.09 g.
Diameter
28.5
mm.
Thickness
2.5 mm.
Alignment
Medal ↑↑
Shape
Round
Edge
Reeded