1 Dollar - Elizabeth II 4th Portrait - Kookaburra Penny

This piece commemorates the original 1919 Australian penny, which itself became one of the most notorious rarities in Australian numismatics — the 1930 penny struck from the same dies is arguably the country's most famous coin. The Kookaburra Penny design was first used on pattern coins in 1919 when the Melbourne Mint briefly experimented with a kookaburra motif before the kangaroo reverse was adopted for circulation coinage.

Struck at 60.46 grams against the original penny's roughly 9.4 grams of bronze, the scale difference alone makes handling one an odd experience for anyone familiar with the circulating predecessor.