1 Riyal - Abd al-Azīz Saudi Arabia

Abd al-Aziz ibn Saud unified the Arabian Peninsula by force and diplomacy across three decades, but his kingdom had no coherent national currency until 1935 — transactions had long relied on the Indian rupee, Ottoman coins, and Maria Theresa thalers circulating side by side. The Saudi Monetary Agency itself didn't exist until 1952, meaning this series was administered through the Finance Ministry. Production was contracted to the Philadelphia Mint for most of the run, an arrangement that reflected both the absence of domestic minting infrastructure and the American interests then consolidating around Aramco oil concessions.

The .9167 fineness matches the old British silver standard, a deliberate choice to ease acceptance among merchants already familiar with sterling-denominated trade coins.