If it was before Jan of 68 it would have had "Z-Z" or in this case "Z-2". But its a June built car.
Why would a corvette bronze car have a Z-Z (british green) code on it when Corvette bronze was not a standard Camaro color until January of 68, and when it was added it is code O? British racing green also was one of those colors added in January of 68 when Black, Fathom blue, Grecian Geen and Palermo Ivory were deleted, and Rallye Green, Corvette Bronze, Lemans Blue, and Britsh Green got added? Codes J,O,U and Z didn't exist as a Camaro paint code before 1/68.
Were talking the L78 with the - paint code above in reply 56. Think we have a couple of converstions crossing over one another here.
Can't explain why yours has a special paint code on the tag, you seem to have a standard Lemans Blue car (we sure its lemans blue and not some other GM special order blue color?). There are two blue colors on your car from the cowl tag picture, one darker than the other. Is it paint fade, or is there another color under the current color?
If we follow the general rule that GM didn't use the Fisher cowl tag for anything and the front end stripes were painted by GM off line in the sheetmetal and paint booth no where near the cowl tag.