Watch List notes:

ARAB-SASANIAN; Khosrau II style. "ST"(?) Istaxr mint. Æ (2.57 gm; 20 mm). "ST"(?) Istaxr mint. Bust turning left, text in front of face blundered / 4 line legend with first 3 for Shahadah and the fourth line "ST"(?) Istaxr. Well struck on a nice flan. Brown reddish patina. Choice EF. Extremely rare.