A beautiful piece. Very rare item in such good condition.
An undescribed error in the legend at Vossberg.
Obverse: in the pearl rim the Grand Master's shield, in the outer rim the legend:
MAGST CORADVS TERCI9
Reverse: in the pearl rim the monastic shield, in the outer rim the legend:
DNORVN PRVC COIN.
Silver, Diameter 21 mm, weight 1.69 g