I have finally found all the old booklets from the 70's with the Datsun paint codes from my work. None of the codes are still in the new PPG paint system unfortunately, some are in the old (late 90's) system but very hard to find and make sense of.
The scanner has made the colours look a little different, but the 40 odd years of use has made them dull and dirty anyway.
They may be good to refer to for someone
