Thanks for the posts and the help peoples. I usually know what I am buying, so this has been kinda fun. I feel like Nancy Drew. I took a few more fotos in case some of you can identify tubing based on bridges and lugs (I know I certainly can't). I ripped it all apart, and there is no serial number or identify marks, although the corroded seat post binder says chromo. I guess at least I know that that is chromoly. The fork says Lung and made in Tawian, so I am guessing that Hsin Lung made it. The frame is 27.2, but I am still looking for my cold setting seatpost screwdriver to smash and mallet that cavity back into its former size. Mandatory or not, calipers are not that useful in getting accurate readings when metal parts have gone through trauma and are out of round.