10 Penniä Finland

The most intriguing thing about the 10 Penniä coin is that it was originally struck in silver, reflecting Finland's status as a Russian grand duchy, but by the 1910s, economic pressures forced a switch to copper alloys that circulated alongside the older pieces.

This created an odd mix in pockets across Finland, with silver coins from as early as 1865 rubbing elbows with copper ones introduced around 1917. Designs varied, too—early versions bore the profile of Tsar Alexander II, while later ones featured the Finnish coat of arms after independence.

We don't know exactly how many silver variants survived the wars and economic shifts, as records from the Helsinki mint are spotty. One dry note: I've seen collectors chase these as if they held alchemical secrets, but it's just metal and history, nothing more.