Hi,
Seborga as found in wikipedia:
https://en.wikipedia.org/wiki/Principality_of_Seborga
The Principality of Seborga (italian: Principato di Seborga) is a micronation or a fantasy state, that claims a 14 km2 area located in the northwestern Italian Province of Imperia in Liguria, near the French border, and about 35 km (23 mi) from Monaco.[1] The principality is in coexistence with, and claims the territory of, the town of Seborga.
As such they have no coins, but tokens, so they do certainly not circulate, since people in "Seborga" use Euros, thus you're right, those round metal things are uncirculated..... (and for me without interest, but that's just my personal opinion!).
Ole
Globetrotter
Coin varieties in French:
https://monnaiesetvarietes.numista.com