So, if we keep that complement, does everybody agree that we should use P.T.T for pre-1991 movies and La Poste for 1991+ ones? And that it should be kept only if concerning a real change on the vehicle, i.e. not for a body color that could just be a paint job made just for the movie/series?

Or, as the changes were apparently only made on pre-1991 vehicles (no Renault 4 were produced after 1991), should they all be set as P.T.T, whatever the relase date of the movie is?
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(too few vehicles are concerned, so I'll handle it manually. But I want to be sure to do the right changes )