SteelNipple
Old School Hero
I corrected the frame weight as it was really 60g more than I estimated it to be(originally weighted with headset cups).
I was looking at the 1988 "Tange Frame Components System" catalog and both the Tange no. 1 and no. 2 tubesets used the same 0.9-0.6-0.9 DB seat tube. Stated weight for the framesets is 2220g for the no.1 and 2290 for the no.2the cherry red frame is 59.5x57 C-C with Tange Champion NO.1(the seat tube is most likely Champion 2 tubing as the ID is 26.8mm and the frame is on the larger side).