30 Dollar - Elizabeth II 4th Portrait - ANZAC Spirit 100th Anniversary

Issued to mark the centenary of the Gallipoli landing on 25 April 1915, this coin belongs to a wave of Australian commemorative output that accompanied one of the most heavily funded centenary programs in the country's history — the Australian government committed over $550 million to WWI centenary commemoration between 2014 and 2018. The pad-printing process, applied over the struck silver surface, allowed colour reproduction that conventional die work cannot achieve, a technique Perth Mint had been refining since the early 2000s.

At a kilogram of .999 silver across a 100.6 mm planchet, production tolerances are unforgiving — any surface contamination during pad-printing is essentially irreversible.