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thank you for sharing this interesting find!
and a good job with the pictures.
definitely french; yes to LXXII as a date
appears it may be a Gitane Super Corsa model; top-of-the-line road machine
there is a wonderful resource here for Gitane bicycle information -
and it is in english -
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regarding the D marking on the dropout:
it is fairly common to see a D or G marking on the dropout of a french produced cycle
the letters usually stand for
droit and for
gauche; right and left respectively
however, the D in this case is on the left dropout; on the other hand it is on the
right side of the left dropout
it may indicate the name of the frame maker...or it could be the mark of an inspector (pure conjecture on me part)
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fittings note -
wheels, pedals, brake levers, shift levers and bar add-ons are the most obvious non-original bits
the water bottle mount is a post-factory feature and was placed higher than anyone in the trade would make it; may have been accomplished with rivnuts
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safety tip -
stem looks to be mounted too high for safety; there should be at least seven cm's engaged down inside the steerer. suggest you not permit anyone to operate the bicycle until it is lowered.
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