Originally Posted by
T-Mar
I concur, this appears to be 1985 +/- 1 year. The serial number should allow us to determine the build date. The derailleurs and brakes are Shimano Z-series, which was quite common on upper entry level models of this era. The rear derailleur appears to be the Z503-GS model, while the front is a Z204 and the brakes are Z570. While it uses Tange 900 double butted CrMo, it is only used in the main triangle. The stays are hi-tensile and depending on the exact year, the forks are either hi-tensile steel or Mangaloy. MSRP was $250-$270 US during 1984-1986.
I agree that this is a very small frame for someone 5'10". This looks like about a 19" frame and normally I'd recommend a frame size of about 22" for an average proportioned male of this height.
Nice, it is quite light, but also small as you said. I will check for the serial number and post it here.