HUNGARY (Kingdom). Sigismund of Luxembourg (1387-1437), Silver Denar, Kassa mint, 14mm, 0.5g, obverse; MON SIGISMVNDI, double cross, reverse; REGIS VNGARIE ET C, quartered shield, mintmark D above. Huszár-576, GF.
Reference; Lajos Huszár, Münzcatalog Ungarn von 1000 bis Heute , Munich, 1979.