1964 1/2 VIN QUESTION

That would be the actual production # as far as I know. In the first four months after showing the car on April 17th, 1964 they sold over 100,000 units.

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April 17th, 1964 that is pretty dang early as they started in march I think and there are other others Falcon as an example that are included in that number IIRC.

They unvieled the car in April. The first four months are from April to August after which the cars became what we know as the '65 model.

Mustang new car production started numerically from "100,000". There is no car #000,001 or 0005478. Your car is the 5478th vehicle built on THAT particular assembly line in 1964. Other type of vehicles (possibly falcons/comets/and maybe fairlanes) are also part of that #--depends on what was scheduled on the assembly line on what day. I don't know if the VIN's were differentiated as to the Mustangs being 65's and the other car's as 64's--did other Fords models have a 64 1/2 year too??????

If 2 cars are being built on 2 separate assemby lines, such as one in California and one in dearborn, it is possible that there are 2 vehicles with the same last 6 #'s. What differentiates the cars would be the 2nd letter of the Vin. R for California and F for Dearborn. 5R07F100000 vs. 5F07F100000 are possible VIN's, assuming that both facilities produced 64's. Another neat thing is that the assembly lines could start up months apart and and yet both could still use the same #, beginning at 100,000.

All in all, your car is considered a very early Mustang.

It would be hard to say how many cars were made before yours because like others said other cars had consecutive numbers in the mix. I remember reading that Fairlanes were on the same line as Mustangs.

My son's 64 1/2 was had a build date on April 29 with the vin being 122167. I thought his was fairly early but there had to be a lot built before his.