Thanks @
juvela, your knowledge continues to amaze me. Where do you get your knowledge or data for lugs and frame details?
The use of Campanolo fork ends suggests at least upgraded fork Tubing so I wouldn't be surprised if the fork Tubing is also Columbus. We forgot to ask if there is a marking on the 172.5 mm Campagnolo Record cranks after Strada indicating year of production of the crank. The mix of later 3 hole Super Record front Derailleur and 2nd generation Rally rear derailleur would suggest the bike was rebuilt a few times with a number of touring parts transplants.
Super Record drilled brake levers, yet the brake calipers are Dia-Compe. The pedals are Kyokuto Top Run and seatpost is SR Laprade, yes important to figure out what size it is marked which will suggest a Columbus tubing type, assuming its double butted. The 30mm seat post diameter originally quoted should be checked with a caliper or at least a known good metric ruler. Or it should have stamped markings on it.