Watch List notes:

World Coins, Yemen, Mutawakkilites, Imam Ahmad, ½ Ahmadi Riyal, AH 1379 / AD 1960 (2), double crescent below date, rev. dates, denomination, and mint (KM.Y16.2), certified and graded by NGC as Mint State 65+ and Mint State 66 (2)
Ex Baldwin's vault.
(50-80 GBP)