it's not faded,....the snapshot is a darker shade than the postcard but the blue on the card still does not resemble the candy sapphire blue. .... you're right about the color for 1975. That's one reason i put the card out there was for curiosity sake as the color appears to be none i've ever seen. I don't know french but the lower right corner seems to say the colors were blue( bleu) and red-orange (rouge-orange).
Other obvious differences are the blinkers, mirror base attachment, and no reflectors on the head light housing bolts....