A very interesting imitation / forgery from the era of the crown trojak of Sigismund III.
Intriguing especially in terms of the coats of arms and marks placed at the bottom of the reverse. Leaving aside the Lewart coat of arms, which instead of a lion has something like a Swan, the coin bears two marks - one modeled on the hooks known from the mints of Greater Poland, and the other (an arrow) characteristic of Lithuanian issues (the coat of arms of the Grand Treasurer of Lithuania - Demetrius Chalecki).
Legends, portrait or other features very nice.
Understated silver?, diameter 20 mm, weight 1.78 g.