The Senior trophy was donated to the Auto Cycle Club, now the Auto Cycle Union, by Joseph the Marquis de Mouzilly St Mars, the President of the Federation Internationale de Motocyclisme in 1905-1906. His name can still be seen on the award. The Senior TT Trophy was first presented, to Charlie Collier, in 1907 who won the first TT Race.
The Senior Trophy was based on the Montague Trophy, awarded to the winner of the TT car races, which pre-dated the motorcycle TT, by the way Charlie Collier took the Senior trophy home as they did in those days