Allegro (Swiss) 61cm frameset in SF BayArea (Mill Valley) with 25.8 Campy seatpost for $250, says it's 1977 and 531...looks nice but I question that seatpost size: I have a '75 and it's metric 531, but takes a 26.6 (a typical size for this)
http://sfbay.craigslist.org/nby/bik/1263708480.html