Dinky Toys 164; Vauxhall Cresta
Dinky made the Cresta and Corgi made the Velox. The two cars are very similar and I have to thank Wikipedia for helping me out with the difference. Both were pretty swish having big six cylinder engines but the Cresta was the up-market version having two-tone paint, a heater and a clock as well as leather seats. So now you know.
The Cresta was in the Dinky range from 1957 to 1960. Colours were cream over maroon or grey over green.