The amber coating is not the same as the yellow cast to the glass itself. Many Nikkors from the 1960s have amber coatings on the front element, including the Nikkor-S 35/2.8, Nikkor-S 50/1.4, Nikkor-P 105/2.5, 50-300/4.5 Auto and so on. But when you look through the lens, the glass is clear - no colour cast. In my experience, the Nikkor-S 5.8cm actually has a light pink coating...
As for the 35/1.4, all the early versions with metal focus ring have the same coatings and glass, including the Thorium glass which turns yellow. The change from Nikkor-N to Nikkor-N.C is purely cosmetic, reflecting the multicoating which was already present in the first version.
Note: my database lists Thorium against the prototype, that is intended to be read for all the following versions, I didn't write it for each following sub-version to reduce repetition and due to lack of space, but maybe I should for clarity?