Common, scarce and rare Saudi Arabia currency (paper money; bank notes [also, banknotes]) at Mintmark.com.

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"The riyal (Arabic: ريال, ISO 4217 code: SAR) is the currency of Saudi Arabia. It is abbreviated as ر.س or SR. It is subdivided into 100 halala (Arabic: هللة) . . . In 1953, the Saudi Arabian Monetary Agency (SAMA) began issuing Haj Pilgrim Receipts for 10 riyals, with 1 and 5 riyals following in 1954 and 1956, respectively. These resembled banknotes and were initially intended for use by pilgrims who exchanged foreign currency for them. However, they became widely accepted in Saudi Arabia and largely replaced silver riyal coins in major financial transactions. Consequently, the Monetary Agency began issuing regular banknotes for 1, 5, 10, 50 and 100 riyal in 1961, with the Pilgrim Receipts being demonetized in 1964. 500 Riyal notes were introduced in 1983. 20 and 200 riyal banknotes were issued in 2000 to commemorate the centenary of the founding of what became the Kingdom of Saudi Arabia. SAMA has announced that a new series of banknotes bearing the face of King Abdullah will be issued starting in April, 2007. A popular trick amongst Saudi school children is to place a rolled 20 riyal note over a 200 riyal note. The two notes bear portraits that are identical, with the exception of the angle of the head. An amusing question is asked, e.g. Will Hussein ever be rich? By inserting a pencil into the rolled 20 riyal note and moving it back and forth, a simple animation effect is created and the king appears to shake his head. [Fifth issue:] On May 20, 2007,
the Saudi Arabian Monetary Agency, pursuant to article (4) of the Saudi Currency Law, issued under the Royal Decree No. (6) and dated 1/7/1379H.
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announced the fifth domination of the Saudi Riyal that features King Abdullah Bin Abdulaziz's picture on all notes except the 500 riyal, which features the late King Abdulaziz Al Saud. The 100 and 50 riyal notes were released on May 21, 2007. The 10 and 5 riyal notes followed on June 2007, then the 500 riyal followed on September 2007, and finally the 1 riyal note completed the series on December 2007. It is expected by the SAMA that the fourth (current) series will take approximately two years to phase out, although a complete removal of the current series require more than two years since the fourth series has been in circulation for well over 20 years. The fourth series which feature late King Fahad's picture will remain legal tender under the Saudi Arabian monetary law. The new series will have the latest and most advanced security system to prevent from counterfeiting and other similar activities. In June 1986, the riyal was officially pegged to the IMF's Special Drawing Rights (SDRs). In practice, it is fixed at 1 U.S. dollar = 3.75 riyals, which translates to approximately 1 riyal = 0.266667 dollar. This rate was made official on January 1, 2003 . . . Saudi Arabia is a member of the Cooperation Council for the Arab States of the Gulf, which plans a monetary union with a single currency by 2010 . . ." — Saudi riyal at Wikipedia