Sol de billon Ste Dévote - Antoine I

Antoine I ruled Monaco under French suzerainty at a moment when Louis XIV's wars had drained metal reserves across the continent. Billon — a debased silver-copper alloy — was the practical answer to a shortage of fine silver, and Monaco's small-scale issues of this type circulated primarily within the principality itself, supplementing the French coinage that dominated regional commerce.

The Gadoury reference distinguishes between MC80 and MC80a, a die variety split likely reflecting minor differences in the positioning or rendering of the Ste. Dévote dedication — Monaco's patron saint whose cult had been central to Grimaldi dynastic identity since the medieval period.