Watch List notes:

SUDAN: Muhammad Ahmad al-Mahdi, 1881-1885, AR 20 piastres (23.36g), AH1302 year 5, KM-2, struck at Omdurman, minor weakness of strike, Fine to VF. Only crown issue of the 'Mahdi' and rare. Struck in the year of the fall of Khartoum and the Mahdi's unexpected death six months later.

Estimate: 600-800 USD