yes engine mounts on the early LiS150 special (pacemaker) were neuvo white to match the tanks and frame ... its been a well established fact for some time .
I have pictures of several including my own.
However I wasn't aware that the TV175 was also fitted with the same white coloured mounts though.
A couple of other odd things about my 64 Italian imported special that I noticed was that it has a 175cc stamped inlet manifold fitted...far as I can tell it is the original equipment .
Also there was no rubber gasket /trim fitted under the air scoop on mine either and that is definitely how it left the factory as the fresh paint underneath clearly shows.