Looks like a steel door. What about the legs? Are they steel?
Can't be a "A" because... well because.
Can't be a "B" because it has a single screw handle.
Can't be a "C" or "D" because the handle is incorrect (It has the two lines on the left side of the handle. "C" and "D" wouldn't have the lines).
So, if it has steel legs and door, the oldest it could be is an "E".
Great score BTW. Always good to see the classics wind up at home with a grillfella.