Originally Posted by
Grand Bois
It's Gitane (Gypsy) and a 70's Gitane will have metric-sized Reynolds tubing and French threads. You should read what Sheldon Brown had to say about French bicycles on the Harris Cyclery site. The stem will be 22 mm and it's clamp will probably be 25 mm. The BB and headset will be French. The seatpost will probably be 26.4 mm.
I love riding my Gitane, even though it's a bit too small for me.
Good point. I spaced the stem and seat post in my response. French stems are getting hard to find. You can get a (gasp) adapter to use a modern stem. Depends on how hung up you are on "originality".