1 Dollar - Elizabeth II 4th Portrait - Ocean Series - Bottlenose Dolphin

The Ocean Series was issued by the Royal Australian Mint across 2006–2007 as a run of circulating commemoratives, each featuring a different marine species. Pad printing — a process borrowed from industrial product marking — was applied to standard aluminium bronze planchets to add colour, making these among the earliest Australian circulating coins to use the technique. The colour layer is notoriously susceptible to wear, and fully struck examples with intact pad printing are considerably harder to find than the mintage figures suggest.