Here's a companion to 131, the Cadillac Eldorado and this 1953 Packard Convertible model is similarly stylised - it shares some features with the real car but nothing like it's proportions.
My first view of this car was that it was a model of the ultimate early 50s Packard, the Caribbean, but a very helpful and knowledgeable visitor to my website from Florida has pointed out my error. The Caribbean while looking superficially similar has open wheel arches at the back and lacks the side trim which on the full-size car looks like a chrome spear. After going back to my researches (actually a quick look on Wikipedia) I am now convinced that this is a Packard Cavalier - the mid range car from 1953/4 which fits the description better while not being quite so exotic.
I still believe though that Dinky modelled the car from a drawing in the brochure as the proportions of the Dinky and the car in the picture are similar and neither of them are much like the real car. The brochure and the Dinky both have the three circular blobs on the sides of the rear wings which appear in none of the pictures of the 53 Packard that I've been able to find, although I'm told it was a feature of the 1952 model and available as a dealer fit option in 1953. Given all that - the car is still very swanky and grand and I love it.
It was either light green or tan with red seats and a grey driver. From 1955 to 1961 it had red painted hubs and in 1962/63 it had silver spun hubs. Values are pretty good across all versions, the later spun hubs cars are harder to find and attract a premium.