Hi,
Jeremy is right (although the only TR4 I've ever seen that was confirmed to have been factory equipped with a hard top was entirely black, which made it a moot point on that particular car).
Basically, a car bought new with OEM two-piece hard top fitted by the factory offered three choice: painted to match, black or white.
An OEM two-piece hard top added later came in two choices: black or white. But, I bet a lot were painted to match, after the fact. Certainly, in terms of originality, you could get away with black, white or matching the rest of the car.
Surrey panel (vinyl) inserts were offered in black or white. The folding framework for the Surrey panel was only black, I think.
The headliner/trim of two-piece hard top was always white, in a vinyl that matches the material used to cover the original sunvisors.
First 500 OEM hard tops had an aluminum roof section. After that, they were steel. (Backlight frame was always cast aluminum.)
There are also special door gaskets used with the OEM hard top, 100" long instead of 77". That's so the seal goes all the way to the top of the window, at it's rear edge.
The "fuzzy" (aka, "draught excluder") was also changed when a hard top was fitted, to a single very long piece that goes all the way from the top of the windshield frame on one side, down around the door, up and over the leading edge of the backlight, around the other door and up to the top of the other side of the windshield frame. There is another, usually black (I think) "fuzzy" 3/4 of the way around the periphery of the hard top roof panel. The other fuzzies were various colors to match the interior trim, but are not now available to match one of the reds (I forget which, there are a bright red and a dark red "Matador" interior color), and the blue fuzzy matches the later, Shadow Blue interiors well, but not the earlier Midnight Blue. Oddly, my TR4 which had a Midnight Blue interior did not have fuzzies. Instead, it had a vinyl trim like many other cars. Perhaps this was done because the factory couldn't get fuzzies to match Midnight Blue, either.
The hard top I've got for my TR4 still has its original paint, which is Spa White. It's an earlier top, with the aluminum roof, so this color makes sense. I'm not certain, but would assume OEM hard tops painted white after TR4 Ct21xxx in March, 1963 would have been painted New White (Paint code #19) to match that color, which replaced Spa White on the rest of the car.
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