I have a 1998 730; label says "Cro-Moly Main Frame." No name brand tubes (as compared to, say, my slight-older 930 that says True Temper). Someone shared this comparison of steel Multitrack frame materials a while back, in this thread I believe
https://docs.google.com/spreadsheets...NHc/edit#gid=0 which might be interesting.
That said, I very much like the way my 730 rides, and I don't think I could tell the difference if it did have name-brand tubes.