65-66 factory racing stripes

As far as I can tell being I have owned several of these and only one still has original paint with stripes is under paint at the bottom right of the fender tag that car has 2 paint codes for silver and black. It is a Commando car. I have read and cannot say this is fact because of it not being true info. is that it was also a dealer paint option and not many came off the line with the stripes.