Ian. In the UK at least, the term "veteran" usually applies to machines built no later than 31st December 1914. This is the criterion that determines whether a machine is accepted by the Sunbeam MCC dating Committee for the issue of a Pioneer Certificate qualifying it to take part in the Annual Pioneer Run to Brighton from Epsom every March. With the larger early Douglas Models only the 3.5hp (500cc) model falls in the veteran category. The earliest 4HP (600cc) running from 1915 to 1923 and normally termed vintage.