Rasulids
al-Mansûr 'Umar ibn 'Alî (626)634-647 H./1229-1249 AD Dirham 636 H., Mabyan, type C. Album, Checklist 1100.3. 2.06 g.; Rare Extremely fine
This is a genuine specimen of a coin type, which was much debated in consequence of its first publication in the catalogue of Spink Zürich auction 31, 20 June 1989, lot 104 as coming from a mint in Mina outside Mecca, see Venetia Porter, The Rasulid Sultan al-Malik al-Mansur and the mint of Mabyan, Arabian archeology and epigraphy vol 1, no. 1, October 1990, p. 38-45, and a doubtful gold piece of the same type in Islamic Coin Auctions 19 lot 121.