Where is the date?! [solved]

Found one of these: https://en.numista.com/catalogue/pieces25238.html in a bin of junk tokens for 15 cents each. It's very worn, so all I could read was "5 GR__ZY ___S" on the back where it used to read "5 GROSZY POLS". But I can find no indication, either on the remains of the coin or on the listing here, where the date is! I probably won't be able to read it but I'd at least like a chance to try... I knew this little metal sliver was old right away so I had to figure it out   

It's above the eagle's head.

THANK YOU, I'm not observant... it's 1819. Just made it into my top 20 oldest!