I do, however, have the privilege of presenting an Egyptian 25-piastre planchet that was initially struck 80 percent off-center by 25-piastre dies. After that, the off-center 25-piastre coin was placed inside a much larger 50-piastre collar and struck by two defaced 50-piastre dies. The design on the obverse and reverse die face was almost completely ground off. Even so, the seller managed to discern a date (2010).
In a final unexpected touch, the reverse die is rotated approximately 120 degrees counterclockwise relative to the obverse die (medal rotation is normal).
During the second strike, the minimum die clearance was great enough that only the thicker, unstruck portion of the 25-piastre planchet received an impression from the defaced 50-piastre dies. While it looks like the off-center strike came last, this impression is refuted by the presence of fully developed 50-piastre coin-style reeding at either end of the long axis of the coin. Those endpoints coincide with the normal diameter of a 50-piastre coin and therefore the diameter of the collar. The metal at the tip of the off-center strike was also pushed up by collar contact.
The 25-piastre denomination is struck on a planchet composed of nickel-plated steel while the 50-piastre design is normally struck on a planchet composed of brass-plated steel. We therefore have in this double-denomination error the rare trifecta of a planchet error (off-metal/wrong planchet), a die error (defaced), and striking error (off-center first strike and rotated die error on second strike). This is the first PDS-trifecta error coin I’ve encountered.
The mint personnel responsible for it were quite inventive during their shift.