Originally Posted by alk
looks like yellowjersey used to have decals, but they are out of the ones for the 5000 model.
http://www.yellowjersey.org/sekai.html
there's a 1975 sekai catalog there. it says the 5000 from that year is made from "Tange Professional 0.6x0.3 double butted Cr-moly throughout" and that it weighs in the low 4 pound range with the headset. that is an obscenely thin tubing diameter, and an obscenely light frame. with that in mind that it has received some dents is unsurprising.
seriously, 0.6x0.3 tubes! that's thinner than ishiwata 015, which has a maximum recommended rider weight of 125 pounds.
http://www.desperadocycles.com/Tubin...per_Tubing.htm
now yours may be a different year and have different tubing. still, i would suggest treating it nicely.