Joe Craig with his 1924 Model 18 Norton.
Simon: "I had a feeling I had seen this bike before and I have run it to earth in Dennis Howard's Norton book published in 1972 and marred by very poor photographic reproduction/print quality. The shot of Joe which was included in that book shows him at the end of the 1924 Ulster with the inevitable cigarette clamped firmly between thumb and forefinger, mounted on IA4906. This view shows the triangular engine plate extension on the timing side which carried the exhaust valve lifter cable stop etc. This seems to have been dropped on the 1925 bikes so the photo above probably dates from 1924."