[1] The first Chamberlain tractor produced was the model 40K, which had 40 horsepower (30 kW) twin-cylinder, horizontally opposed engines.
In 1955 Chamberlain developed the Perkins diesel powered Champion models and as a publicity stunt in the same year Chamberlains entered the new diesel powered tractor in the around Australia Redex Trial as a rescue/recovery vehicle.
Initial attempts to enter the event were met with disbelief, and it was only officially recognised as a recovery vehicle for one leg of the trial.
Tail-End Charlie is reputed to have completed one stage of the trial while towing as many as six other entrants that broke down on the way.
In subsequent years, Chamberlain produced a range of iconic larger tractors suited to broadland farming in Australia.