25 Dollars - Elizabeth II Pearl Harbor

Tuvalu has no meaningful constitutional or historical connection to Pearl Harbor — Perth Mint has simply used the nation's issuing authority as a vehicle for themed bullion since the early 2000s, a commercially driven arrangement that produces legal tender technically valid in a Pacific microstate with a population under 12,000. The Pearl Harbor series trades on the 75th anniversary of the 1941 attack, a crowded commemorative niche in 2016.

The .9999 fine specification places this a step above the more common .9999 four-nines standard only by assay precision — the gold content aligns almost exactly with a quarter-ounce.