A very nice piece on a disc with a mint crack.
Piece from Tadeusz Kalkowski's collection, complete with his envelope.
The second type of Warsaw weights, with a new reverse - inscribed.
Obverse: crowned shield with eagle, behind it crossed key and sword.
Reverse: horizontal inscription I AUREI NUMMI PONDUS 1768; in the rim:
67 EX MARCH COLONIENSE.
Brass, diameter 18.5 mm, weight 3.45 g.