This could be a much nicer bike than I originally thought.

(1) The freewheel is a 5 speed cyclo competition, 14-22: Vintage Cyclo Competition Freewheel 14 22 5 Speed French Threaded France | eBay

(2) The bike might well be a Follis 172 with a 531 DB main triangle. This is a good site (in French) about Follis bikes: FOLLIS - Joseph FOLLIS - Marcel FOLLIS - ANCIENS VELOS LYONNAIS There is some really neat discussion of Follis back when it was hot stuff in pro races. Neat stuff. If you scroll down, you'll find catalog pages in English back in the 70s when Follis was trying to make inroads into the US market.

My bike has the chrome of the Follis 172 and the parts group--while not the same as in the catalog--looks roughly of the same quality. The higher end bikes are full 531, have a nicer parts group, and use nice stainless cable guides. The 172 has braze on cable guides in exactly the same position as on the bike I bought. So I think this is a Follis 172.