1 Dollar - Elizabeth II 4th Portrait - Australian Kookaburra

The Australian Kookaburra series, running since 1990, changes its reverse design annually — a deliberate policy by the Perth Mint that drives year-on-year collector demand and renders each date a distinct type rather than a continuous issue. The 2006 edition was struck at a time when the Perth Mint was aggressively expanding its bullion program, competing directly with the Canadian Maple Leaf and Austrian Philharmonic for international silver investment market share.

KM#749 carries Ian Rank-Broadley's effigy, the fourth portrait of Elizabeth II introduced to Australian coinage in 1999.