11 Decimae Sethlans series

Populonia, the only Etruscan city known to have struck its own coinage directly — rather than relying on shared or mercenary mint arrangements — produced this bronze series during a period of rapid political absorption into the Roman federation. The Sethlans attribution ties this issue to the Etruscan god of fire and the forge, a fitting patron for a coastal city whose wealth derived substantially from iron smelting on Elba.

The decimae denomination system is peculiar to Populonia and has no direct Roman parallel.