David Mikeladze did another interesting discovery: Sudan 20 piastres and 50 piastres exist also in magnetic version (probably steel core) for year 2006. You can find details in Numista (en.numista.com), where new KM numbers (KM124a & KM123a) are suggested.
20 piastres (KM124 and KM124a):
50 piastres (KM123 and KM123a):
The magnetic types bear a curved "6" in the year and also have different edge reeding:
(news by David Mikeladze)
(images taken from en.numista.com)
A friend sent me this photo of a piece that needs identification. Can you help?
Information provided by Mark Lehman: it is a 19th or 20th century "Magic Coin", a good luck token made to vaguely resemble something with cufic script, from "the Mysterous East", some of these were carried by members of a club or organization, but this one seems to have no information of that sort on it, so it's a pocket piece or possibly something sold as a prop for a stage magician.