1 Riyal / 100 Halalah - Abdullāh

Abdullah bin Abdulaziz ascended to the throne in 2005 after decades as crown prince and, effectively, acting ruler during his half-brother Fahd's long incapacitation. The bimetallic 1 Riyal was introduced under his reign as part of a broader rationalization of Saudi coinage that consolidated smaller denominations and reduced the number of circulating types. The Saudi Arabian Monetary Authority had historically been conservative about coinage reform, making the introduction of a new format a relatively deliberate bureaucratic event rather than a reactive one.