Features
Issuer Australia 
Queen Elizabeth II (1952-2022)
Type Non-circulating coin
Year 2000
Value 50 Cents
0.50 AUD = USD 0.33
Currency Dollar (1966-date)
Composition Silver (.999)
Weight 36.31 g
Diameter 38.7 mm
Thickness 3.5 mm
Shape Round
Technique Milled
Orientation Medal alignment ↑↑
Number N# 104021 Help
References KM# 499


Commemorative issue
20th Century Monarchs

Series: Masterpieces in Silver

Obverse
4th portrait of Queen Elizabeth II facing right wearing the Girls of Great Britain and Ireland Tiara

Script: Latin

Lettering:
ELIZABETH II
AUSTRALIA 2000
FIFTY CENTS
IRB

Designer: Ian Rank-Broadley Read more on Wikipedia

Reverse
Crown 1937 obverse design of KM# 34
King George VI facing left

Script: Latin

Lettering:
GEORGIVS VI D:G:BR:OMN:REX F:D:IND:IMP.
HP

Translation: George VI by the Grace of God, King of all the British territories, Defender of the Faith, Emperor of India

Designer: Thomas Humphrey Paget Read more on Wikipedia

Edge
Reeded

Mint
Royal Australian Mint, Canberra, Australia (1965-date)
Comments
This NCLT Fine Silver (.999) coin was released by the Royal Australian Mint in 2000 as part of that years "Masterpieces in Silver" set. The theme for the set featured Monarchs of the 20th Century.
The reverse of the coin is based on the 1937/38 King George VI Crown obverse.
The obverse of the coin carries the Ian Rank-Broadley fourth effigy of Queen Elizabeth II.
The coin is the size and shape of a modern Australian NCLT $5 coin and has a decimal face value of 50 cents.

Other coins in this Masterpieces in Silver set were:-
King George V (20c), King Edward VII (20c), Queen Elizabeth II (20c) & Queen Victoria ($2).