A very nice natural trojak.
The first of two types of Danzig trojak 1537.
An early type distinguished by a portrait with a headpiece resembling a boy's hairstyle (classified by Edmund Kopicki as "head with hair"). With the reverse with the former notation of the city's name - DANNC3K.
PRVSSI / GROS variant.
Variant with a dot after AR- and CIVI-.