Maybe some folks don't know, so I guess it might be important to remind everyone that at least in the 60s and 70s that Flack tubing almost invariably was used on the cheapo models within whichever bike brand. As we all know, the mechanical benefit of the make of tubing is significantly less important that the assembly technique and expertise, but in the case of most Falck tubed bikes, as those made with cheaper grades of Columbus (Aelle, Chromor, etc), the workmanship and features (investment cast bits, chrome plating, etc.) were also lessened due to the economics of the process of making a less expensive end product.
NOT that these bikes don't ride great, yada yada...
Dale Brown
Greensboro, NC