Thank you. Yes, I was quite excited when I seen it....I had spent to much money on eBay recently and almost passed on it...but life is short and fleeting! I have drilled the drop out adjuster. Happy with the result, I got it straight....but dear God it put up a fight! I never liked threaded screws in the drop out, especially non stainless ones! My Gitane has Delrin shaped inserts which the bolt screws into setting the axle placement.

The weight seems to agree with full 531.
I am interested if anyone has views to the badge dating, but you seem to have come to the same date as I have. Now I just have to find the bits....I have some Shimano 600 bits so will probably build up with this and see how that feels. What does D47 stamped on the BB stand for? Also 64-CP and A37? We may never know....

Trying to find 1977 brochure with C4 if you know of one?

The stack height of the fork was very short 34.9mm. I have just had delivered a Motobécane headset which I have posted pictures of the stack height on another post 37.8mm, but race is 26.5mm and fork is 27mm. Sigh. Trip to the metal shop then....