much the standard banknotes are 1,000; 2,000; 5,000; 10,000; 50,000; and 100,000 Rial notes. German-issued World War I occupation notes During World War I, a group of German and Turkish soldiers occupied a small portion of Iran until 1918. They circulated five different denominations of German Imperial Treasury notes (printed around 1905) with a red overprint in Persian that were used locally at the rate of 4 marks to 1 toman. In addition to the 12 qiran 10 shahi (5 mark) and 25 qiran (10 mark) notes pictured, the rest of the issue included: 5 tomans (on a 20 mark-note), 25 tomans (on a 100 mark-note), and 250 tomans (on a 1,000 mark-note). Wilhelm Wassmuss appears to be given credit for the occupation and issue of currency. Notes References Sources External links Money in Persia History of Money in Iran (BBC) Banking in Iran Currencies of Iran Proposed currencies