Iran - 50 Iranian Rials - P-123b - 1978-79 dated Foreign Paper Money

P-123b. The rial is the official currency of Iran. It is subdivided into 100 dinars, but due to the rial's negligible purchasing power the dinar is not practically used. There is no official symbol for the currency but the Iranian standard ISIRI 820 defined a symbol for use on typewriters (mentioning that it is an invention of the standards committee itself) and the two Iranian standards ISIRI 2900 and ISIRI 3342 define a character code to be used for it. A proposal has been agreed to by the Iranian Parliament to drop four zeros, by replacing the rial with a new currency called the toman, the name of a previous Iranian currency, at the rate of 1 toman = 10,000 rials. Read more at https://en.wikipedia.org/wiki/Iranian_rial