Rippo,
A lot of these surviving Bedfords, carried on into postwar service and went through rebuild programmes. Authenticity was not important, so long as a truck came out the other end, so early and late features often crop up, such as the Vokes air cleaner, I know of a Vokes bellows air cleaner on a later MW with full windscreen and half doors. I wonder if the hoops in the photo taken at the factory, were in fact the cab hoops? Think I have seen a photo like that, will try and find it. I do have a list of chassis numbers to year, from Bart's book and the contract numbers are listed with census numbers in a repro book produced by Groucho Publishing.