I downloaded all these browsing yesterday. I ended up bidding on a Tomica Bellett 1300 on ebay. That is the one on the assembly line, in front. The 1300 did not get dual headlights.
I think an engineer designed the fastback. It looks awkward. It was the most expensive and the rarest Bellett; it was built to go a little faster than the GT-R coupe on the racetrack by improving the aerodynamics.