Originally Posted by unworthy1

well, there's nothing there that I can make any headway with: It has a 1mm too-small seatpost for standard Imperial 531 seat tube (should be 27.2), but if it were metric 531 it would still be too small, as that would take 26.6 or 26.4. Is there a brazed-in sleeve at the top of the seat tube?
The details are all good: 531 decal; Campy long drop-outs, nice lugs and forkcrown, tasteful chrome and paint...but there's nothing really distinctive that indicates a brand or builder: no piercings or pantographing, no decals or serial number. Seems like a mid-to-late 70's frame, the components (except the wheels and brake levers) could all be original and hung on a bare frameset. Given the number of FR parts (Crankset, headset, pedals, BB, brakes) I'd guess the build-up was done in FR or Benelux...all the guess I got