Yup. They usually come that way.
Somehow, the prospect of Columbus tubing on a Schwinn raises potential value - even though nobody has come up with 100% solid proof as to what Tenax truly is. Sure, it rides nice, but so does Cromor and Tretubi.
Same thing is killing the '83-85 Raleigh USA frames. Until someone can positively ID what Raleigh 555SL is, the value of these things are going to suffer relative to comparable machines with known tubing.
Do not forget Peugeot and HLE.
I find it odd that the classic-loving masses look askance at Tenax and Reynolds 555 (or 502, whatever that is) becasue we cannot figure out what it is, but Bridgestone and Miyata have their own tubes and we don't seem to question it. Lets not forget about Bianchi's "Superset" either.
I am starting to care less about the tubing sticker and have been paying more attention to the welds. I have seen (and have hanging on the wall), some quite reputable frames that seem to have been made shortly after a seven martini lunch. Most non-accident caused service failures are the result of poor construction, not tube failures. I am not fond of gas-pipe, but people seem quite happy with any number of straight guaged bikes made of decent tubing (Raleigh Super Courses, Schwinn Super Sports, most early mountain bikes, to name a few). I have an '86 Faggin which is one of my favorite to ride. Whatever non-pedigree Columbus tubing it has, they got it right. Frankly, if saving 12 ounces off a frame for some extra tube butting, I would be better off shaving about 30 pounds of my own butt.