On 14 October 2026, a very specific question gets answered. How much is Royal provenance actually worth and does it matter whose Royal provenance it is?
At Broad Arrow's Global Icons: Zoute Online auction, bidding closes on a 2016 Bentley Mulsanne Extended Wheelbase that was built specifically for Queen Elizabeth II, used by her on numerous official engagements, and is one of only two such cars ever made. The other remains permanently in Bentley's Heritage Collection in Crewe. This is therefore the only Queen Elizabeth II Mulsanne EWB that will ever be available for private ownership. Once it sells on 14 October, that window is permanently closed.
Broad Arrow estimates it will sell for €400,000 to €450,000, roughly £350,000 to £390,000.
We think it could go considerably higher. Here is why.
The Car
The 2016 Bentley Mulsanne EWB was prepared by Bentley's Press and Special Vehicles Department and registered in October 2016 with the plate DG66 OKM, a registration it has retained throughout its royal service life. The interior specification was designed around Her Majesty's requirements: Twine and Cumbrian Green leather, Burr Walnut wood veneers, deep lambswool carpets, rear privacy curtains. The front centre armrests were removed and replaced with a custom-sized tray specifically designed to accommodate Her Majesty's signature Launer London handbag, a bespoke modification that exists on no other Mulsanne in the world.
After active royal service concluded, the Royal Coat of Arms inlay was removed at the request of the Royal Mews, along with the handbag tray, standard practice when royal vehicles leave official use. The car returned to Bentley's Crewe headquarters where it remained until Queen Elizabeth II's death in September 2022. It has covered approximately 6,000 miles from new.
The car has been photographed carrying the Queen to high-profile engagements, including the funeral of Countess Mountbatten of Burma and British Champions Day. The number plate DG66 OKM alone carries documented historical significance. The service history, including maintenance at Bentley's Crewe factory throughout its life, is complete and fully documented.
Why the Estimate Might Be Conservative
Broad Arrow's €400,000 to €450,000 estimate is the auction house's professional assessment of where the bidding will start and where it will likely settle. It is a reasonable number for a low-mileage Mulsanne EWB with exceptional provenance.
But this car is not really a Mulsanne EWB. It is a singular piece of Royal history the only example of this specific car available to any private buyer, anywhere in the world, at any price.
To understand why that matters, look at what has happened to other Royal vehicles at auction. Queen Elizabeth II's former Range Rover fetched £175,000 at auction for a car worth roughly much less without Royal provenance. The premium for Her Majesty's ownership was approximately £110,000 on a relatively ordinary vehicle. A 2013 Bentley Mulsanne used by King Charles III during his time as Prince of Wales sold at H&H Classics in December 2025 for £73,125 against a £80,000 to £100,000 estimate, and against the £26,000 to £50,000 a standard 2013 Mulsanne would fetch in the same condition. The Royal premium on the King's car was roughly £25,000 to £47,000 over standard market value.
Now apply that logic to a car that is one of two ever built for the reigning Monarch, the only one entering private hands, with 6,000 miles and a fully documented factory service history.
The provenance premium on Queen Elizabeth II's Mulsanne EWB is not comparable to the King's Mulsanne. The King's car was a standard Mulsanne allocated to the Royal Household by Bentley's Press Department, used during official engagements, certainly, but a car that existed as a press and special vehicles unit first and a Royal vehicle second. The Queen's 2016 EWB was commissioned specifically for Her Majesty, built to her personal specifications by the Special Vehicles team, and modified in ways that make it genuinely bespoke such as the handbag tray, the privacy curtains, the Coat of Arms.
There is no comparable car. There is no reference point. There is no ceiling, because the ceiling is set by what the winning bidder decides on the day.
The King's Bentley vs The Queen's Bentley
The provenance comparison sitting in plain sight is the most interesting element of this auction.
We spotted a 2014 Bentley Mulsanne formerly belonging to King Charles III currently advertised privately on AutoTrader for £80,000, broadly in line with the £73,125 it achieved at auction in December 2025.
The Queen's 2016 Mulsanne EWB, two years newer, significantly lower mileage, specifically commissioned and built for Her Majesty rather than allocated from a press fleet, and genuinely one of one in private hands, is estimated at £350,000 to £390,000.
That gap, roughly £300,000 between the King's car and the Queen's estimate, tells you something important about how the market values provenance. It is not simply about Royal connection. It is about whose Royal connection, how direct that connection was, and how permanent the scarcity is.
The King's Mulsanne was a car used by the Prince of Wales. The Queen's Mulsanne EWB was a car built specifically for the Monarch, to her personal specification, in a total of two examples, one of which will never leave Bentley's collection. These are not comparable provenance stories.
What We Think It Will Do
At the conservative end, the Broad Arrow estimate of €400,000 to €450,000 is defensible as a base case, a buyer who wants the car primarily as a Mulsanne EWB with exceptional provenance, rather than as a singular piece of Royal history.
At the optimistic end, this car has the profile to attract an entirely different category of bidder, a collector for whom the historical significance of owning the only privately available Queen Elizabeth II Mulsanne EWB outweighs any conventional market valuation. That buyer has no ceiling. They are not paying for the Mulsanne. They are paying for something that cannot be bought anywhere else in the world.
Our view: the Broad Arrow estimate is the floor, not the ceiling. The result will depend entirely on whether that second type of bidder, the one for whom provenance is the entire point, shows up on 14 October.
It will be very interesting to see where this lands. What do you think it will sell for?
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