YEMEN. 1/2 Ahmadi Riyal, AH 1379 (1959). Sana'a Mint. al-Nasir Ahmad bin Yahya (Imam Ahmad). PCGS MS-65.
KM-Y-16.2. Fresh surfaces shimmer when held under a light source, while a light dusting of olive and charcoal patina demonstrates their originality. While Krause claims this issue was struck from the punched out center of a Maria Theresa Taler, no sign of an undertype remains, so mint workers likely shaved or flattened planchets before they were struck again.
Estimate: $60 - $100