I seem to recall (not sure though) that a very small few made it through as very special order cars prior to what I guess was the eventual patent or copyright of that color... Don't hold me to that though cause I'm probably thinking that it was that 50 you just mentioned. I know it was a happenstance mixture paint that the Petty crew came up with and had to mix some white in cause of not having enough blue paint or something of that nature. Also the only Burnt Orange Bird I know of was at the Gartlit's Museum, so I'm guessing that real pic was taken in front of the museum, cause I've never seen it before anywhere ?