This is the first Rolls Royce Phantom IV of total 18 units. This hand built limousine was delivered to Prince Philip, Duke of Edinburgh on 6th July, 1950.
Originally, it was not an official state car, it was just a private owned car of Princess Elizabeth (now HM The Queen Elizabeth II) and the Duke of Edinburgh.
The most recent time of this limousine on public media was on the wedding of Prince William and Kate Middleton.
It was used for carrying Prince of Wales and Duchess of Cornwall from Clarence House to Westminster Abbey.