The sol was introduced in 1863 when Peru completed its
decimalization, replacing the
real at a rate of 1 sol = 10 reales. The sol also replaced the
Bolivian peso at par, which had circulated in southern Peru. Between 1858 and 1863, coins had been issued denominated in reales, centavos and escudos. The sol was initially pegged to the
French franc at a rate of 1 sol = 5 francs (S/. 5.25 to and S/. 1.08 to
US$1). In 1880 and 1881, silver coins denominated in
pesetas, were issued, worth 20 centavos to the peseta. In 1881, the
inca, worth ten soles, was introduced for use on banknotes. The peg to the franc was replaced in 1901 by a link to sterling at a rate of 10 soles = 1 pound, with gold coins and banknotes issued denominated in
pounds (
libra in Spanish). This peg was maintained until 1930 when Peru left the
gold standard and established an official rate of S/o 2.5 =
US$1, a rate which remained until 1946. In 1933, banknotes were issued once more denominated in soles, now called
soles de oro. This name also appeared from 1935 on coins, when silver was replaced by base metal. Since 1975, multiple rates to the US dollar have been used. Due to the
chronic inflation that occurred in Peru during the second presidency of
Fernando Belaúnde Terry, the sol was replaced in 1985 by the
inti at a rate of 1,000 soles = 1 inti. The
nuevo sol replaced the inti in 1991, during the administration of
Alberto Fujimori, at the rate of 1 million to one (or 1
billion (109) old sols to 1 nuevo sol). Sol notes and coins are no longer legal tender in Peru, nor can they be exchanged for notes and coins denominated in the current nuevo sol. ==Coins==