Ulrich von Jungingen's shellac - Poland's most famous Grand Master of the Teutonic Order, who died at the Battle of Grunwald in 1410 while commanding the Teutonic forces.
A beautiful piece, especially for this type of coin.
Gloss in the background, patina.
Definitely recommended.
Obverse: the Grand Master's shield, in the rim the legend: MAGST VLRICVS PRIMV.
Reverse: the shield of the Order, in the rim the legend: MONETA DNORVM PRVC: