Buy the PT 1680, refinish the crown guards, change the crown/tube out and wear it. Don't worry about being called out, if YOU like it, that is all that matters. 90% of the population won't even know what a 1680 is, only that it is a Rolex. Because you own a Rolex, most people are going to assume it is fake anyway.
If the color of the red dial bothers you that much...go to a white dial 1680 or source another dial. You could even retrofit one from NDT/Yuki/etc. Just make sure that it fits. Based from my experience, I've noticed that dealer vintage dials tend to be a little larger in diameter than gen-like dials. There are a LOT of aftermarket dials out there now and they do not come from the same factory.