1925 Postage Due 1 pi. blue with the - Nejd Sultanate Post - overprint sideways in violet, a fair to fine unmounted block of 4 (bottom roulettes are pulled), stamps individually signed in pencil by John Wilson (JMW) with Arabian Philatelic Association International certifcate (W.A. King) 2003. Provenance : Rudy Thoden collection march 2003 lot 6748, cat.v. £ 600