What was Spartan currency?

I'm curious to know, could you explain what exactly was Spartan currency? Was it a unique form of money used specifically by the ancient Spartans, or did it have broader applications and uses? How did it differ from other currencies of the time, and what was its significance in the Spartan society and economy? I'm fascinated by the history of finance and currency, and I'd love to learn more about this fascinating aspect of Spartan culture.