+1 Neighbor has extreme memory fade. No Japanese bike with a high ten steel frame from the 1970s sold for $1300, it probably sold for more like $130. If you need the seat post that high, then that frame is way too small for you. Also, I would pitch that modern hybrid suspension seat post (I hate them personally).
If you can't find any information on it via google, then it is a private label bike. There were thousands of brands back then, every tire shop, gas station, department store, sporting goods store, etc, was in the bike business. No one is taking the time of supporting those long gone brands with info on the web. DT shifters, three piece crank, and chrome stays are all good signs. The fact that it had steel parts (you mentioned polishing them) is indicative of a low end bike. Better bikes came with all alloy parts.
SR was just another in a long line of good parts makers, that sold parts to all the bike brands. Look up date codes on the parts if you want on the vintage trek site.
Last edited by wrk101; 05-13-12 at 06:17 AM.