In the early 19th century, copper 1 fals coins were issued, together with billon 1 nasri, 1, 2, 4 and 8 kharub, 1 and 2 rial, and gold sultani. A new coinage was introduced in 1847, consisting of copper 1 fals, 1 nasri, 1⁄2 and 1 kharub and silver 2 and 5 rial denominations. Between 1856 and 1858, copper coins for 3, 6 and 13 nasri were issued along with silver 2, 4 and 8 kharub, 1, 3 and 4 rial, and gold 10, 20, 25, 40, 50, 80 and 100 rial. The gold coins were initially struck in pure gold, later reduced to .900 fineness, with the 20, 40 and 80 rial denominations short-lived. The 6 and 13 nasri coins were later overstamped with the Arabic numerals "1" and "2" ("١" and "٢") to indicate that they were to circulate as 1 and 2 kharub coins, an increase in value of ½ nasri for the 6 nasri coin. In 1864, a new copper coinage was introduced in denominations of 1⁄4, 1⁄2, 1, 2, 4, 8 kharub. Silver 8 kharub and gold 5 rial were also introduced. In 1887, the slightly smaller 25 rial coins were introduced (see above), with the additional inscription "15 F" to indicate the equivalence to the French franc.