My Dad owned and operated a full service bike shop in Eastern CT from 1952 until 1978. We sold Flandria bikes during the bike boom period of 1971-1972 and for a while afterwards. I believe we received them from a distributor in the Springfield or Worcester , MA area. They were made in Belgium and were OK bikes. Nothing spectacular at all, your basic cottered crank, Mafac brakes, and Simplex derailleur set up. The pictured bike looks like the ones we sold, except now converted to upright bars, etc. Parts replacement might be a bit interesting since the seat post, stem, hbars were , as far as I can remember, more toward the French out of normal mm sizes. I would strongly take a look at the Peugeot too.