I don't like the Muncie stamp. There are a couple of characters that are not "TYPICAL" of the characters used on 69 Muncies. But I don't have one with that exact date to compare to, so I won't say its not a real stamp at this time, date on the stamp is in the ball park for that VIN number. I've got an image of a P9C22A stamp on an N6257xx Vin'ed car, but the M20 dates seem to jump around quite a bit.