-JdK- Bas in the Netherlands just got this 1933 Model 50 Norton and Simon looked up the numbers:
"Pleased to say engine and frame match! It is listed as a 1933 Model shipped October 1932 to Petersens Denmark. Originally had a specially tuned engine, dynamo, gate change on tank, speedo and control panel. Gearbox was 6761 and forks 6942."