BOSNIA. Stefan Tvrtko II Kotromanić , 1404-1409 and 1421-1443. Gros (Silver, 27 mm, 2.14 g, 1 h). δNS TUARTCO REX BOSNЄ ('Our Lord Tvrtko, King of Bosnia' in Latin) Crowned helmet over coat of arms flanked by R and T. Rev. S GRЄGORIUS NACARЄnUS St. Gregor, nimbate, standing facing, holding crosier in his right hand; in field to right, fleur-de-lis. Jovanovic, 60.1. Struck from a worn reverse die, otherwise, about extremely fine.