External link Conversion Calculator for Units of MASS (& Weight) (http://www.ex.ac.uk/cimt/dictunit/ccmass.htm)
... F1 Winners: 1950 - Juan Manuel Fangio, (Argentina) 1955 - Maurice Trintigant[?], (France) 1956 - Stirling Moss, (United Kingdom) 1957 - Juan Manuel Fangio, ...