Watch List notes:

(g) Yemen, al-Nasir Ahmad bin Yahya (1948-62), gold Half-Riyal (2-Sovereigns), San'a, AH1377 (1957), denomination and date read inwards, Arabic '2' counter-stamped above swords (KM Y#G16.1), formerly mounted, nevertheless a rarely offered denomination and date, in NGC holder, graded AU-Details.

Estimate: £2000 - £2400