If the VIN on the title matches the VIN on the car.....it's just a typo on the title.....I've seen that plenty of times before. I've seen numbers transposed also, and in PA, there is a form you can fill out to have prior title mistakes fixed with the issue of a new title. Now if you are saying the car has a 68 VIN, but the grille, markers lites, tail lites etc...are 69 type, then someone swapped the parts for some reason, or swapped the VIN plate from a 68car to a 69.