Siege of Khartoum, Sudan, [Top Pop] 50 Egyptian Pounds, 1884, serial number 1471, diamond top centre, blue handstamps on face, reverse signature (Pick S111), in PMG holder 58 Choice About Uncirculated,. Highest denomination from the Siege of Khartoum series, and second rarest type after the smallest denomination but yet elusive 1 piastre. An excellent example to add.