A 1955 Ferrari 750 Monza Spider is to auction at RM Sotheby's.
The car is being consigned from the collection of famed racing driver Jim Hall.
Hall, along with fellow drivers Carroll Shelby and brother Phil Hall, raced it extensively during the 1950s and 1960s.
It has been in his care ever since.
The car has not been raced since the 1970s and has since undergone a no expense spared restoration. In recent years it has toured the country appearing in concours and rallies.
Jack Boxstrom of RM Sotheby's explains: "A fantastic piece of motorsport history, chassis 0510 M is likely the most original 750 Monza in existence; its provenance and importance are second to none.
"While many four-cylinder Ferrari sports racers fell to the crucible of motorsport or general neglect following their racing careers, this particular example has been incredibly preserved.
"It's highly successful competition history—which includes three legends of American racing—coupled with its superb condition, and the fact it is offered directly by its owner of 60 years, no less, one of the drivers who campaigned it in period, place it in a class of its own."
The lot is expected to make around $4m-5.5m in Monterey on August 19-20.
The sale will also feature a wealth of vehicles from the prestigious Riverside International Automotive Museum in California, including a 1966 AAR Eagle Indy racer.
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