Abu Dhabi, 1966, 30f on 30np Shaikh Shakhbut b. Sultan Al-Nahyan, Arabic surcharge "20" for "30" error (Scott 18b), o.g., never hinged, Post Office fresh with striking color and crystal-clear surcharge, Very Fine, a remarkably pristine error. Scott $9,000 Suggested Bid $1,500-2,000 (Image)