Australia 50 Cents - Dodecagonal type 1979

Features
Country Australia
Queen Elizabeth II (1952-date)
Type Standard circulation coin
Years 1969-1984
Value 50 Cents
Currency Dollar (1966-date)
Composition Copper-nickel
Weight 15.55 g
Diameter 31.51 mm
Thickness 2.55 mm
Shape Dodecagonal (12-sided)
Orientation Medal alignment ↑↑
References KM# 68, Schön# 55
Obverse
2nd portrait of Queen Elizabeth II facing right wearing the Girls of Great Britain and Ireland Tiara

Lettering:
ELIZABETH II
AUSTRALIA 1979

Engraver: Arnold Machin

Reverse
Australia coat of arms (the escutcheon is carried by a red kangaroo (Macropus rufus) and an Emu (Dromaius novaehollandiae)) and the numeral "50".
Designer's mark "SD" below.

Lettering:
50
SD

Engraver: Stuart Devlin

For these particular model I have the following years1978,1979,1980,1981 and a lot more...
For those interested pls WhatsApp for further assistance,tqvm.
2I20021820