below is the first page from WM 4121 showing the British Army model types and wheelbases.
Most of the visual ID to which is which is in the size wheel it has on as well as where the spare wheel is located and these are only useful if the truck is original.
the wheelbase is the only true method of determining these trucks as they ALL had the same front sheetmetal and cab (for trucks only and not panel vans etc) or if you can ID the data plate if the vehicle still has one.
All the other features that seperate them are underneath, tucked away out of sight. Different rear axle type, heavy springs etc.
as well as different engine bore sizes.
Also while I have a few pics of these 'D' series Doges and it is one of my most favoured trucks I in fact have very little information and not all that many Photos. I think Hanno has more info then me on this subject.
hope this helps
Cliff
