The Australian 20 cent coin was first introduced with decimalisation on 14 February 1966 when it replaced the pre-decimal Australian florin, to which it is equal in size and mass. The original reverse design by Stuart Devlin has not been changed since its introduction.
The denomination is occasionally used by both the Royal Australian Mint and the Perth Mint to issue collector coins, which are legal tender in Australia - such as this one.
This coin design was issued as part of the Royal Australian Mint's annual baby coin sets, which the mint has been releasing annually since 1995. The 2025 set, named Aussie Bubs (from Australian: Australian Babies) continues the tradition of joyously celebrating all things baby, coin and collecting. Inspired by traditional designs, these coins have a fresh, whimsical twist. Elyssa Waterford's design beautifully capture Australia’s wildlife, where "Lenny the leatherback turtle races across the beach on the 20 cent coin, with swirls of sand also reflecting the traditional 20c coin design".
No coins of this type have been released into circulation. | 
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