I did follow the link, but certainly not worth the cost for something that might have dried in the pot. As they say it’s more of a talking point (probably better kept in the loctite museum)
Yes, it was only meant to be an example of the actual product, I wasn't suggesting that you buy it.
If I search the loctite website it shows nothing for the search of plastic gasket, just links to glues and resins that can be used to bond them. Though a google search did find something called loctite plastic gasket with quite a heavy price tag, in a modern bottle...
Loctite sealant technology does seem to have progressed since "Plastic Gasket No.68" was available.
... also so not something branded NV (I’m guessing by the lack of it being NVT, that must have been produced at some point in the 80’s after triumph closed its doors)
Before rather than "after" as Norton Villiers
became Norton Villiers Triumph (NVT) in 1973 (and when they dropped the NV green globe logo) so couldn't really have been manufactured later than '73.
The 064208 Loctite Plastic Gasket pack was mentioned in a '73 Norton factory service release.
Wellseal still seems as good as anything else in my opinion.