Numismatic Puzzle: Prague Groschen

The piece of today’s puzzle comes from a Künker auction:

Bohemia and Moravia. Wenceslaus IV, 1378-1419. Prague groschen n.d., Prague. Broad version of 15 Prague groschen. From the Salton and Donebauer Collections, Hess auction (1889), No. 850 and the Wunderly von Muralt Collection, L+L Hamburger auction (1899), No. 61. Extremely rare. Very fine to extremely fine. From Auction Künker 379 (2023), lot 100. Hammer price: 80,000 euros.

Have fun with the puzzle!