Coronation Observation Car

Coronation - Observation Car. This car was attached at the rear of the Coronation streamlined set upon introduction in 1937. There are several black & white photos of this car but, as far as I'm aware, only one brief movie in colour and that is contained within a documentary DVD of Peterborough and District (would you believe !). The clip only lasts about 4-5 seconds as the train passes at high speed. I have not seen a good model of this vehicle. I suppose that's because it's difficult to build with all the curves every which way. I intend to build one in 3D one day !!