Australian twenty-cent coin

Twenty Cents

Australia
Value	0.2 AUD
Mass	11.3 g
Diameter	28.65 mm
Thickness	2.50 mm
Edge	milled
Composition	75% Copper, 25% Nickel
Years of minting	1966–present
Catalog number	—
Obverse
Design	Elizabeth II, Queen of Australia
Designer	Ian Rank-Broadley
Design date	1999
Reverse
Design	Platypus
Designer	Stuart Devlin
Design date	1966

The twenty-cent coin of the Australian decimal currency system was issued with conversion to decimal currency on 14 February 1966,^[1] replacing the florin which was worth two shillings, a tenth of a pound.

To date, four different obverse face designs have been used: from 1966 to 1984, the head of Queen Elizabeth II by Arnold Machin; from 1985 to 1998, the head by Raphael Maklouf; from 1999 to 2019, the head by Ian Rank-Broadley; and since 2019, the head by Jody Clark. The obverse has the inscription AUSTRALIA and the year-of-issue on the right hand side, and ELIZABETH II on the left hand side.

From 1966 to 1994, the design for the reverse face was Stuart Devlin's platypus. With the exception of commemorative issues, it continues to be the standard design for the reverse face.^[1]

The United Nations 20c was the first commemorative 20c coin issued for circulation in 1995.^[1] Commemorative designs had been issued for circulation previously in other denominations.^[2]

20c coins are legal tender for amounts not exceeding $5 for any payment of a debt.^[3]