50 Cents - Elizabeth II 4th Portrait - Starfish

Pad printing on silver coins — essentially a form of industrial ink transfer borrowed from promotional merchandise manufacturing — was embraced aggressively by the Perth Mint in the 2000s and 2010s as a way to differentiate bullion-adjacent collectibles in a crowded market. The technique allows colors that electroplating and enameling cannot achieve, but long-term ink adhesion on proof surfaces remains a known concern for storage and grading.