Yea, it was weird on those older cars. The paint code listed was unique to the 2 tone cars. At the dealership where I worked, we had an old touch-up paint book that broke that into 2 separate paint codes.
https://www.automotivetouchup.com/
have had good luck with those guys.. and they have chips & codes to look at to make sure you are getting the right color
they even had the right color for my old 1967 F-250 pickup
can get it in touch up size, rattle can, or larger sizes for painting an entire vehicle