A very nice piece.
An item definitely rare in such good condition.
Obverse: in the rope border bust of the ruler to the right, in the outer border legend:
FRIDERI-D-G-DVX-SLESI-LEG-BRE;
Reverse: in the laced rim a Silesian eagle, in the outer rim legend:
VERB-DOMI:MANET-IN-ETERN-1545-;