I guess the only other thing to at least mention, since Bob brought up the phrase "before it was delivered to the first owner", would be to discuss dealer changes. My judging experience is probably shy of 1% of what Bob has done, but I have done MCA 1967-68 concours judging of about 50 cars now. In all of them there is only one case where there was a documented dealer change. The original owner brought the original dated paperwork that provided sufficient evidence that he had the dealer install a few over the counter options. That said the odds of a situation where someone who was not the original owner, or via family hand-me-down situation, that also has dated dealer paperwork identifying a change, ends up at a car show judged to the rules we are discussing is probably as close to zero as anything. The point is that a pre-delivery change needs to be very well documented and is not a method by which to make the car something that it originally wasn't.