World's Lowest Value Current Circulating Coin? (May Upset Jbuck!)

Having lived in Thailand and China, the lowly Satangs and Fen have negative value in the sense that even poor locals don't often want the hassel of them. It takes accumulating too much time and effort to accumulate enough to even buy a meal at the street stand. Good luck unloading them, as those street vendors didn't always accept them either. Generally speaking, the only places we got them were the large department stores like Lotus because some accountant was determined to live life down to the extreme decimal.

Regardless of the low value, it is a nice enduring reminder of numismatic history: one of the very few remaining currencies descended from the old gros tournois and Venetian grosso (German groschen, etc).

The Polish 1 grosz was first struck under Casimir the Great in the 1360s: https://en.numista.com/catalogue/pieces124191.html

It was used continuously from the 1520s until the demise of the Polish state in 1795 (turning into a copper coin along the way in the 1750s: https://en.numista.com/catalogue/pieces262438.html ).

When the Republic of Poland was recreated after World War I, the 1 grosz was again struck in bronze (1923-1939) then in aluminum (1949) and eventually brass (1990-)