There was no real VIN in 1950-1952.
Those trucks had a Vehicle Serial Number (on door jamb) and an Engine Serial Number (to the rear of where the distributor goes into the block). Either code might have been used for registering/titling for those years of trucks. I have bought two trucks, each from two states, and in each state a different code-type was on each truck's titles/registrations.
If the engine was replaced, and the Engine Serial Number was used for registration/titling, the engine installer might have pressed the truck's original Engine Serial Number into the replacement engine (to the rear of where the distributor goes into the block).
If you are trying to ID your truck, post your codes here and people will try to help (and will post links the code information).
