Heller 1430-1448 Sigismund of Luxemburg Duchy of Wroclaw Wroclaw

rare with an inverted letter "T" on the obverse (instead of the so-called lying letter "T"),
obverse: head of Saint John,
around the letter M ? W M ? W,
reverse: lion,
below it the letter "T",
glossy;

variety listed only in Paszkiewicz's catalog: 1.9k2