For 1956 Triumph offered the TR5/R in limited numbers for those Riders interested in the best possible 500cc attainment, factory records show that 112 TR5/R Engines were produced and 104 complete bikes, therefore 8 spare Engines, this one being the 40th, they were built for street use with easy conversion to race trim with quick detachable lighting. The build date of this run was January 12th 1956 and ended April 27th 1956. These TR5’s were the first the factory had supplied for Daytona use as previous bikes had been T100 Models. Reasoning for this was the Trophy was nearer to the spec required already having narrower guards, small tank, gaitored Forks, Q.D. Lighting e.t.c.