Originally Posted by
trashion
Eeh, buried under weeds and outside for years...A quick google search tells me about "Jeunet Franche-Comte" bikes...decent entry-level bikes from the 1970s. I don't think it's worth fixing up if it's weathered the outdoors for this long, for the money you'd put into restoring it (sounds like most parts need replacing) you could buy a nice used bike.
Jeunet made some nice bikes, and even the entry level ones I've seen have at least some bling. If it's decent, fix it up and ride it. The low level ones had forged Simplex drops without a hanger, so it's easy enough to switch over a more durable Suntour derailleur.
Problems may arise in the french nature of the bike. If you need to replace either the bottom bracket or headset, these can require som patience. In practice, the headsets on these old Frenchies are practically indestructible (unless they're period Campagnolo), and bottom brackets will shortly be available via velo orange.
Post pictures, we can assess it better.