Franc

Franc, a silver coin 835/1000 fine, the monetary unity of France since 1799, weighs 5 grammes and equals about 9½ d. in English currency (£1 = 25.3 francs); has been adopted by Belgium and Switzerland, while under other names a similar coin is in use in Spain (peseta), Italy (lira), and Greece (drachma).

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)