5 Dollars - Elizabeth II Eagle and Rattlesnake

Cook Islands has issued commemorative silver dollars under New Zealand's currency arrangements since the 1970s, and by 2016 the program had expanded into a sprawling catalog of wildlife-themed bullion pieces aimed squarely at the collector market rather than circulation. This piece falls squarely into that commercial run — struck at a third-party mint under license, with no connection to any Cook Islands monetary event or policy decision worth noting.

The KM#2414 reference places it within a sequence of similar issues from the same period, all sharing the one-troy-ounce .999 fine silver specification that became the de facto standard for this segment of the market after the American Silver Eagle normalized the format globally in 1986.