Looks like a beautiful 1960's bike to me. Nothing about it says low-end to my eye. Durifort made a range of tubing, and was used by Zeus, among others. If the 24lbs is remotely accurate, then there's no way the frame is gas-pipe considering it's got a pump and steel gran sport on it. Never seen those decals before on any Gitane, but I love them - much nicer than the early foil decals that I've seen on most early Gitanes. The French checkerboard decal on the seat-tube is the coolest.