Hello!
This is a so-called “Boratynka”, or a Shilling/Szeląg minted by king Johann Casimir II from 1659 and until about 1667. It's an interesting coin, minted during a political and military crisis in the Polish-Lithuanian Commonwealth. While there are multiple types and subtypes, the “main” ones are the Polish Schilling (with an eagle) and the Lithuanian Schilling (with a knight on a horse, AKA the “pogoń”). As you might've realised, your coins are of the Lithuanian type.
Something that is very common with these coins are the contemporary counterfeits. The Boratynka was so faked, in fact, that there were about 1 billion real coins and about 400 million counterfeits.
And I believe that your coins are contemporary counterfeits. Look at the image of the king. Usually, the portrait of the king has some good details, despite the high numbers. Meanwhile these coins have very crude portraits, with very details. The reverses of these coins also look like they were drawn by children and not by a mint master or a good engraver.
Also, this was not meant to insult your coins. They are some interesting pieces and they nicely show the political situation of Poland back in the day. Contemporary counterfeits are also interesting, with each of them being unique and special in their own way.
Kind regards and have a nice day!
