Bosnia - Stefan Tvrtko II (1404-1408 / 1421-1443) - AR Gros or Double Dinar nd. (Jovanovic 60.1, D&D 6.1.1) - Obv: St. Gregory Nazianzus standing facing with crozier and book, Lily in right field / Rev: Crowned veiled helmet with hop flower, shield below, 1 dot and R-T in fields - 2.36 g. - heavy piece, very good strike, a.XF