I'm trying to identify the exact year/model of a Motobecane called the "Special Sport", which was bought in France. I don't know if the parts are all original, however: It has a Huret Svelto rear derailleur, but I can't tell what model the Huret front derailleur is. It has Motobecane-branded center-pull brakes. Lastly, it has a Maillard Helicomatic rear hub, which would suggest to me that it's an early-'80s model, but the rest of the bike doesn't look very '80s at all.
The frame is a 70-73 motobecane. This head badge was used during this year.
in 74 it was changed to the round version
I however dont see a frame in their catalogs called a super sport, so not to sure about that. however you seem to have matching components to the Grand Touring from this time period.
Here are some old catalog scans