Arab-Sasanian Prototype Issue, Khusru II (A.D. 590 - 627), silver drachm or dirhem, (4.06 g), Darabgird mint, dated year 31 (A.D. 621), with word "praise" in outer margin, (cf.Walker alpha [p.2] Plate I, alpha, cf.M.21, Sellwood type 62, Gobl 214). As struck, good extremely fine and very scarce.
Ex Brian Bolton Collection and previously Noble Numismatics Sale 91, lot 3783. Also R. Climpson Collection, Noble Numismatics Sale 85 (lot 3353). With tickets. The typical Sassanian bust of this coin became the standard bust type of Islamic drachms with governor's names. This type with the additional word in the outer frame also became the model adopted by the Umaiyad Governors using this Sassanian coinage model for these issues.