A one-of-a-kind 1955 Ferrari 410 Sport Berlinetta is expected to fetch millions when it goes to auction in California. It's worth so much that the seller, RM Auctions, won't even tell us the estimate.
However, it's highly likely to make more than the other star car of the sale - a Talbot-Lago T23, expected to generate over $3,000,000. (£2,000,000)
The Ferrari is so special because it's so very rare. Based on the 410 S, only four of which were ever made, this particular one is the only with a Scaglietti coupé body; the other three were open-top.
Due for sale in August at the Monterey sale in California, the 1955 car was first delivered to French industrialist Michel Paul-Cavallier, who kept it for nine years before selling it. It was painted red in the '60s, and was part of French collector Pierre Bardinon's fleet for over three decades.
In 2001, Dutch Ferrari enthusiast John Bosch bought the car, promptly returning it to its original ivory colour and driving it in the famous Mille Miglia event.
Monterey is the first time the Ferrari has been auctioned, and as RM Auctions' Amy Christie told Autoblog, "the estimate for this one is 'available upon request' by interested bidders, therefore I'm not in a position to disclose. I can however certainly confirm that it is immensely valuable and certainly a multi-million-dollar car."
It's likely to eclipse the sale's undercard (the undercar, so to speak) - a 1938 Talbot-Lago T23.
The Talbot-Lago name isn't as evocative to the wider public as Ferrari is, but the T23 Teardrop Coupé for sale in August is a truly spectacular car - as indicated by the £2m-plus it's expected to fetch.
Only five were built, and this one has trotted the globe, first owned in France, then sold to an American, then a collector in Japan, then back to the UK. It was recently restored, although before its restoration it won an 'Elegance In Motion' award at the famous Pebble Beach concours event.
Peter Wallman of RM said of the Talbot: "Arguably one of the world's most stunning and chic automobiles, the 1938 Talbot-Lago T23 Teardrop Coupe is a masterpiece of French artistry and Art Deco design. Simply breathtaking, its proportions and gently sweeping curves are wonderfully representative of France's prewar design themes. Its upcoming sale offers a very exciting ownership opportunity for the successful bidder."