1 ounce of fine gold = 31.1034768 g. First quoted on 1 April 1968.
Source
April 1968 - March 1974: Financial Times (FT); April 1974 - December 1980: Samuel Montagu & Co. Ltd.; January 1981 - December 1998: FT; January 1999 - present: The London Bullion Market Association.
