Watch List notes:

HEJAZ: al-Husayn b. 'Ali, 1916-1924, AE ¼ piastre, Makka, AH1334 year 5 over 6, KM-22, NGC graded AU53 BR, RRR. The engraver apparently chiseled the number 6 for year 6, then realized that was a mistake, and re-engraved the digit as 5, a strong deep numeral 5. Very clear overdate when examined under a 20X microscope.

Estimate: 450-550 USD