How to differentiate the different models of GMCs?

I am bit confused about my coach. The tag in the glovebox is a correction from 1980 (I think) and it clearly says that I have a Palm Beach with Frosted Mint paint. However, when I open the hatches, it looks like the original paint was some shade of pale yellow. Any ideas? Is the corrected sticker wrong? Did the Palm Beach come in any other color than Frosted Mint in 1976?

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That certainly looks like frosted mint to me. Just like every other '76 Palm Beach.
Thanks for confirming, Billy. It seems a little more yellow to me than what I typically think of as frosted mint. I thought it was a “richer”, slightly darker green, like this -

899EFCFC-9A1F-4D59-9400-3D78A79108F5.webp
 
I am bit confused about my coach. The tag in the glovebox is a correction from 1980 (I think) and it clearly says that I have a Palm Beach with Frosted Mint paint. However, when I open the hatches, it looks like the original paint was some shade of pale yellow. Any ideas? Is the corrected sticker wrong? Did the Palm Beach come in any other color than Frosted Mint in 1976?

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The 6-1980 is not a date, the date code is the next number set 070676. Your coach was either built or sequenced for build on July 6, 1976.

Jeremy
 
The 6-1980 is not a date, the date code is the next number set 070676. Your coach was either built or sequenced for build on July 6, 1976.

Jeremy
Thanks Jeremy. I thought since the tag said “Correction” that maybe it had been reissued in 6-1980. If the tag is the original from ‘76, I wonder what was corrected? I see now that the tag posted by ejames earlier also says “Correction”.
 
Thanks Jeremy. I thought since the tag said “Correction” that maybe it had been reissued in 6-1980. If the tag is the original from ‘76, I wonder what was corrected? I see now that the tag posted by ejames earlier also says “Correction”.
Every one I have ever seen says "CORRECTION" at the top.

Jeremy