When Prince Philip's old Range Rover was put up for sale it revealed the extreme safety measures installed.
Land Rover themselves kitted out the top-spec Autobiography Range Rover at their HQ at Gaydon, Warwickshire with several adjustments for its royal owner.
Police lighting was installed as well as unique fixed side steps, which have not been approved for public use.
Additional grab handles were also installed from new to help the Queen to access the 4×4, and the rear TV screens were removed - although they were subsequently reinstalled.
The Range Rover was driven by the Duke of Edinburgh on a high-profile visit by Barack and Michelle Obama to the UK in April 2016.
The car was not the one he was driving when he crashed this afternoon, which is thought to have been a Land Rover Freelander.
It also met Marine One when it landed in the grounds of Windsor Castle and the Queen has been photographed alongside the car.
In November last year the car was up for sale for Sh16,931,100 (£129,850) – 24 per cent more than its list price when new of Sh13,701,300 (£105,080), according to research by Auto Trader.
A spokesperson for Auto Trader told Car Dealer Magazine: "In recent years we’ve seen a big influx of royal cars, many of which hold significant premiums due to the status of the previous owners.
"Low-mileage, expensive extras and expert maintenance are some of the reasons why royal cars are often more expensive than similar models on the market, but data from the Auto Trader marketplace also suggests that the monarchy premium with these cars increases the closer the royal is to the throne."
Today Prince Philip was in a car accident near the Queen's Sandringham Estate.
The 97-year-old miraculously walked away unharmed from the crash.
Two people in the other car involved had minor injuries, Norfolk Police said.
Eyewitnesses described the 97-year-old as shocked and shaken after the crash and they told the BBC that they helped the duke out of the vehicle.
The Mirror understands the Queen’s husband of more than 70 years was “pulling out of a driveway onto the A149 when the accident happened”.
The Duke retired from royal duties in August 2017 and underwent a hip replacement in May last year.
He did not join the Royal Family for their Christmas Day church service.
Buckingham Palace calculated he had completed 22,219 solo engagements since 1952.