250 Dollars - Charles III Arethusa

Arethusa, the freshwater nymph of Greek myth who fled the river god Alpheus by transforming into an underwater spring, became one of the most reproduced coin types in antiquity — her image dominated the silver dekadrachms of Syracuse from the late fifth century BC, cut by engravers who signed their dies, an almost unheard-of practice in the ancient world. Kimon and Euainetos are the two names that survived. Cook Islands has drawn on that Syracusan tradition repeatedly for bullion issues aimed squarely at the collector market for classical-themed gold.