You could get production date from the bodytag on the drivers side firewall. Well, the week. There are good tols here at this site to help you decode or you can post a picture of it here and we can help you with it.
I'm guessing northern car based on options selected. They went for better interior, engine and trans but not A/C. About 3 in 10 cars had A/C. Neither my Ohio or Canada cars had A/C.
1968 400 Coupe, verdoro green, black vinyl top, auto 1969 GTO Judge coupe, Carousel Red, manual 1971 Trans Am, cameo white, auto 1970 Buick Skylark Custom Convertible 350-4(driver), Fire Red, white top, auto 1972 Buick GS Stage 1, Royal Blue, black vinyl top, auto
