A classic British convertible which Prince Philip drove a young Charles to school in is expected to sell for £450,000 next month.
The Duke of Edinburgh took delivery of the Lagonda 3 Litre Drophead Coupe in 1954, earning Aston Martin Lagonda its first Royal Warrant.
Finished in a bespoke shade of Edinburgh Green matched to Grey leather upholstery, the luxurious four-seater convertible was one of just 20 MK1 cars made.
It was fitted with a number of unique features including an extra vanity mirror so Queen Elizabeth could adjust her hat.
There was also a radio telephone which allowed him to speak to Buckingham Palace.
The Royal apparently enjoyed phoning the Queen and disguising his voice when in conversation with Prince Charles and Princess Anne.
Prince Philip used the Lagonda as his personal car for around seven years, driving it to Cowdray Park for polo matches and Cheam prep school to drop off Prince Charles.
He then replaced it with a Alvis TD21 Drophead Coupe which is currently on display at Sandringham.
The Lagonda, which has been valued at £450,000, is believed to be the only personal car of Prince Philip’s in private hands.
It will be sold for the first time in almost 40 years when it H&H auctions it on April 20 at the Imperial War Museum in Duxford, Cambs.
Damian Jones, H&H Sales Manager, said: “This car is part of our history. The accompanying paperwork beggars belief.
“There is an amusing story about Prince Phillip driving Her Majesty through London in this car and being held up by a policeman on point duty directing traffic.
“When the policeman saw who was in the Lagonda he did a double take and swiftly waved them on.”
Under the bonnet of the sports car is a 3-litre engine which accelerates the Lagonda from 0-60mph in around 12.9 seconds and onto a top speed of 104mph.
Prince Philip took the Lagonda on a tour of The Commonwealth in 1956-1957 and there are numerous photos of it at the 1956 Melbourne Olympics and elsewhere.
He also took the Lagonda on a tour of The Commonwealth in 1956-1957 and there are numerous photos of it at the 1956 Melbourne Olympics and elsewhere.
It also featured in several Pathe News films and countless newspapers and magazines from the period.
Prince Philip, who held the unofficial record for the 98-mile run between Bath and London whilst still a Naval Officer, used the Lagonda when he and the Queen opened the M1 motorway in 1959.
The car, which has had just four owners with the current custodian buying it in 1977, is worth around five times as much as a normal Lagonda 3-Litre because of its provenance.