Originally Posted by T-Mar

In Canada, during this era, the "standard" rim size was Canadian 28" x 1-1/2" which is 622mm BSD, the same as 700C. I have seen UK market catalogues for Rudge from 1939 and a circa 1950 catalogue, neither of which show camelback style frames. Consequently, there's a good probability that your bicycle was built specifically for the Canadian market and that the front wheel is correct.