ARAB-SASANIAN: 'Abd al-Rahman b. Zayd, ca. 672-674, AR drachm (2.86g), NAL (Narmashir), AH54, A-10, clipped down to the post-reform Umayyad standard, VF, R. The Pahlavi script often used the letter L to represent either L or R, with a few exceptions, such as the mint of Ardashir Khurra, which was signed ART rather that ALT, but most of the time, what is pronounced R is written with L.
Estimate: 150-200 USD