Watch List notes:

Eastern Sistan, Ya'qub, a drachm of Salih Rida, countermarked ya'qub ja'iz in reverse margin, 2.32g (A -; W -). Host coin pierced and cleaned otherwise good fine, countermark very fine, extremely rare.

The identity of Ya'qub is unknown. See St James's Auction 24, lot 936, for another example of this countermark.