The one-of-a-kind 1964 Shelby Cobra 427 Prototype s/n CSX 2196, nicknamed “The Flip-top” for its unique clam shell design, is set to cross the block at RM’s Automobiles of Arizona event at the Biltmore Resort and Spa in Phoenix on January 22.

Its design, build, development and racing were spearheaded by legendary racing driver Ken Miles and after months of testing and modifications, 2196 became the only prototype produced for the famed 427 Cobras that followed. It was raced in period at Riverside, Sebring and Nassau.

Over the years, 2196 has competed in many of the world’s historic races including Laguna Seca, Monterey Historics and Goodwood Festival of Speed. Today, the well-documented Flip-top sports its original livery of Guardman Blue with white stripes and black interior, and is unquestionably one of the most desirable Shelby Cobras ever built.  (Estimate: Available upon request)

“The 2010 Arizona auction presents one of RM’s most diverse line-ups of automobiles ever offered at the luxurious Biltmore Resort & Spa, ranging from historically significant Shelby Cobras to an unprecedented selection of important concept cars,” said Ian Kelleher, President and Chief Operating Officer, RM Auctions. “Every facet of collector cars is represented at this year’s event with the schedule being extended to two days for a British-themed Thursday evening sale.”

Images: RM auctions

Tags: 1960s, Auctions, Classic Racing Cars, Sports Cars