Heller 1430-1448 Sigismund of Luxemburg Duchy of Wroclaw Wroclaw

a rarer variety with the letters "T" lying on the obverse and the letter "T" on the reverse,
obverse: head of St. Jana,
around the letter M ? W M ? W,
reverse: left,
below it the letter T;

Kopicki: 8765x;
Friedensburg: 554g / 100g;
Paszkiewicz: 1.9k1