My '67-'68 Legnano 'Tipo Roma Olympiad' has Falck tubing throughout; the sticker indicates seamless tubing; the seatpost diameter is 27.0mm...w/ tubulars & early NR gruppo, it weighs in at 21lbs (59cm frame). Just thought I'd muddy the waters of the Falck tubes discussion a bit more .....:) BTW- it is my favorite bike-very smooth and agile, while being adequately stiff for my Clydesdale-esque physique...have no idea how much of that can be attributed to the brand of tubing, though...
Cheers,
Larry Myers Portland,OR,USA