Originally Posted by
roadcrankr
Unaware that Gitane used Nervex. Possibly Motobecane?
The earliest Campagnolo headsets and bottom brackets used a unique script or font.
Close-ups might help.
MICMO built Gitanes and Geminianis of early to mid-1960s commonly used Nervex lugs … posted some pix above, here are a couple more, first is my 66/67 No. 100:

…and here is a slightly earlier bike, maybe 65/66 with pump pegs: