Watch List notes:

Central Bank of Yemen, specimen 20 riyals, 1990, purple, seated figure at left, also specimen 50 riyals, 1990, green, statue, also a uniface proof/specimen 10 riyals, 1993, blue, Al'Baqiyah Mosque at left, all signatures of Muhammad Ahmad Gunaid(Pick 26s, 27As, 24s, TBB B115as, 119as, 114as), red Arabic overprint, uncirculated, the last a Giesecke and Devrient printing, most unusual and very rare (3).

Estimate: £250 - £350