Vinyl top code "U" for a 1972 A-Body

I bought a '72 Skylark this weekend and it has the a very dark brown colored vinyl top that appears to be original (car has 25k miles).

What is the name for a vinyl top that is code "U" ?

 

http://www.atlantabuick.com/PaintCodes.htm

 

Still no "U" code

Scott,
Thanks for the link, but that is the same list that I currently have in some of my books for the 1972 Buick, which have the letters: A, B, D, F, G, H, T

But notice there is still no listing for U

anyone have a book that will tell me the name/color for code U ?

Thanks

 

U paint color is Antique Gold. o No:

 

Dark Covert?
The "u" code is another one of those Buick mysteries. We've never found the answer to this one.