I have never come across an actual pint code t=for the standard alloy. When I compare my TR7 alloys that still have the original finish in good condition against repainted ones on other peoples cars, I always find the refinished wheels are too bright & silvery, if that's a correct term!
The original finish was quite understated & dull, as Chris has mentioned, so it depends on whether you want originality or a bit of sparkle!
By the way I think the Spider alloys were actually a different shade of silver, IIRC the part number was suffixed with S (for Spider?) to distinguish.
Tony

<font size="1">1981 TR7 FHC Cavalry Blue
1980 TR7V8 DHC Jaguar Regency Red - sadly sold!
1977 TR8 FHC EFI Factory development car Inca Yellow</font id="size1">