Watch List notes:

(x) Central Bank of Oman, 50 Rials, ND (1977), serial number A/2 996252, olive and blue on multicolour underprint, Sultan Qaboos bin Sa'id at right with lilac headdress, Jabreen Fort on reverse, (Pick 21a, TBB B201a), in PMG holder, 64 EPQ Choice Uncirculated.

Estimate: £250 - £350