Watch List notes:

ARAB-SASANIAN: Khusraw type, 668, AR drachm (3.88g), ST (Istakhr), YE37, A-B6, with rabbi Allah in ObQ2, superb strike, choice EF, RRR. This is the first reported example of type B6 from any mint other than GD (Jayy), and is probably unique. An extremely rare example of ST mint dated YE37, but of type A-4 with bism Allah in ObQ2, was sold in the Künker auction 188 (June 2011), as part of a group of three Arab-Sasanian drachms in lot 495.

Estimate: 600-800 USD