Hi all, i have a real enigma here...got it off CL 2 years ago for $50. It is has seamed aero tubes, lugged frame, and the most unique feature is the brazed?/tigged? Fastback seat stays that attach below the seat lug. Cant find anything like it anywhere, except modern all tigged bikes. None of the parts are original to the frame, except maybe the simplex DT shifters. I have switced most all parts, and those that came on it were not original, it did have late '70's-'80's simplex front and rear derailers, and levers. No manufacturer info. Anywhere, just the 4 digit serial on bottom of BB. A previous owner had adorned it with bootleg "Cinelli" decals. It weighs around 25 Lbs. The boys on "Bike Forums" were stumped when i posted pics there 2 years ago. Figured i would tap into the Cabe's vast knowledge and see if anyone has any ideas. Thanks for any help.