Watch List notes:

(x) Qatar Monetary Agency, specimen 500 riyals, ND (1973), serial number 000000, blue/green, arms at left, signature Abdulaziz al-Thani, reverse, Mosque of the Sheikhs with minaret,, (Pick 6s, TBB B106s), in PMG holder, 64 Choice Uncirculated, extremely rare.

Estimate: £7,000 - £9,000