1967 L71 435 Corvette stamp opinions

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Thanks every one this is my first C2 so do not know much about them. Tom all I know is it is supposed to be a 3 owner car, the guy I bought it from owned it over 20 years. He was a collector of higher end cars like Ferraris and Porsches. I dealt with his son in Irvington NY. because his dad was selling off his collection and I think his dad was from conneticut.
The car has 80k miles everything is original with the nicest original interior right down to carpet except one repaint before he got the car. The car is pretty much a standard option car and it did come with a hardtop. The son is trying to see what other paper work his dad has.