Exactly - your side windows are Carawagon style, the same as Searle used on 2 door Series Carawagons right until they finished, as far as I know.
Your roof windows are the early ones - I think Calum has the same in his Carawagon - aluminium frame outside screwed to a wooden frame on the inside of the roof (better design, in my opinion, than the later 'windscreen rubber' fittings on mine!).
You also have the removed bulkhead and the Searle cupboards and bed, incorporating the front seats so there's still standing room at the back with the bed made up.
As you say, nicely made but looks like to me a DIY conversion with a real Carawagon roof - does that make it a Carawagon? Does it matter, other than it could be "
Not as described" if a buyer was expecting an original Searle Carawagon
Cheers,
Robin.