It is believed that Rolls-Royce made only three Shooting Brakes, two of which are still in existence. This 1955 Silver Dawn with coachwork by Radford and chassis STH29, was the last of the three built to this specification. The cars were the result of an official agreement between Rolls-Royce limited and Harold Radford (the Coachbuilder). Limited to produce just three examples of the famous, low production Rolls-Royce Silver Dawn Sports Saloon model, with coachwork specially designed for both town and country use.

The adaptations included an opening tailgate which was created by allowing the rear window to open upwards and the lower section of the luggage compartment to open downwards. A few of over 75 fittings included reclining seats, washbasins, picnic accoutrements and more. This may have been a forerunner of the modern 'Hatch-Back.'

The STH29 is probably the most significant of the three built as it was the actual car prepared for the October 1954 Earls Court Motor Show. It was built for display on the Harold Radford stand.