the coin is shown here:
https://en.numista.com/catalogue/pieces63627.html
as a 1 Taler, whereas it's a 1 grosz and it has the km#177!
Mine weighs in at 3.29 grs, but it's only about f+, the diameter is 20.39 mm and the thickness is 1.42 mm. Orientation is medal and the rim is plain.
Ciao
Ole