1⁄16 Ahmadi Riyal - Ahmad Mule

A mule in the strict numismatic sense: this piece pairs dies that were never intended to meet, produced during the chaotic final years of the Imamate under Ahmad bin Yahya. North Yemen's mint operations in this period were inconsistent enough that mismatched die combinations occasionally escaped quality control entirely. The Y#13.1 attribution distinguishes this pairing from related varieties in the series.