Two of the biggest auction houses in the business are teaming up for a landmark sale in New York to take place on November 21, and while most of the 35 consignments that will make up the auction have yet to be announced, RM Auctions and Sotheby's have already announced the car that is sure to be the highlight of the event. The car in question is a one-of-a-kind 1956 Aston Martin DB2/4 MkII Supersonic, custom coach-built by Carrozzeria Ghia. Chassis number 1132 is the only one of its kind.

Unveiled at the 1956 Turin Auto Salon, the car was ordered new from David Brown's Aston Martin by the famously rich Vanderbilts and was driven by American F1 driver Harry Schell. It was featured in Life magazine and spent its early life basking in the soft sunshine of the French Riviera. Recently restored, the Supersonic Aston won awards at Pebble Beach and is expected to fetch between $1.5 and 2 million. (Photos by Darin Schnabel, courtesy of RM Auctions.)