Beautifully minted Danzig penny. Variant identified by Romanczyk as GGd1534_02 with no indication of rarity.
Obverse: in the pearl rim the crowned coat of arms of Gdańsk, in the outer rim the legend beginning with a rosette:
GROSSVS*CIVI*DANC3*1534;
Reverse: in the pearl rim a royal bust in armor and crown, to the right, in the outer rim a legend beginning with a rosette:
SIGIS*I*REX*PO*TO*TO*CI*PR;