1965 GT350 Advanced Prototype. This is vehicle number 12, of the very first 14 ever made:

One of the 12 original "Advanced Prototypes" built to homologate the Shelby Mustang for SCCA Racing. Triple Crown Winner: SAAC 2012, Mid-AMERICA Ford/Shelby Nationals 2012, Mustang Club of America Grand Nationals 2012 (Note: Numbers Matching).