Watch List notes:

(g) Yemen, al-Nasir Ahmad bin Yahya (1948-62), gold Quarter-Riyal (1-Sovereign), San'a, AH(13)71 (1951), Arabic '1' counter-stamped above date (KM Y#G15), first date for type, extremely rare in any condition, in NGC holder, graded MS62.

Estimate: £3000 - £4000