Undisputed champion recognised a different champion. The disputes were usually short-lived as a lucrative fight would be organised between the rival champions. The longest split was ten years, of the middleweight title, between Mickey Walker's move up to heavyweight in 1931 and NBA champion Tony Zale's defeat of NYSAC contender Georgie Abrams in 1941. An early use of "undisputed" appears in a "New York Times" preview of the 1941 fight. The growing popularity of boxing outside of the USA led to creation of various boxing organizations, each strengthening their influence (most notably BBBofC) and having their own champion. This resulted in a
Derek Minter a farm labourer to earn the extra money needed to buy his first bike in 1948, a 350 cc BSA which he also used for trials riding. After National Service in the Royal Air Force, Minter worked for motorcycle dealer Ray Hallet at Hallets of Canterbury. Hallet had been a road race and grass track rider and Minter accompanied him to the Isle of Man as his mechanic for the Manx Grand Prix. Hallet provided Minter with a CB34 500 cc BSA Gold Star which was prepared for racing and stripped of unnecessary weight, but retained the standard, roadster-based equipment