ARAB-SASANIAN, Khusro type with bism allah rabbi, AR dirham (4.02 gm; 33 mm). SK (Sistan/Sijistan) mint. Dated AH 37 (AD 657/8 or frozen year?). Crowned Sasanian-style bust right; bism allah – rabbi in margin / Fire altar flanked by attendants; star and crescent flanking flames. SICA I, 358; Album 5. Lovely strike. Choice Superb "Almost as Struck".