I picked this up on Craigslist last month here in Madison, WI for $85. Except for a good cleaning and degreasing, I haven't gotten too far in getting it ready for resale (too small for my 6'2"). Decent quality, 600 components, SN M4B00246 indicates it's Miki manufactured in early 1984. No dealer sticker. Ugly seat and downtube decals a little curled and not perfectly applied. Model name (Tri Comp) on left side top tube only. Champion 2 tubing. Wheels are 700C Matrix 32h C-II, and must have been added later (I think those are early '90s vitage?). Here's a link to the first batch of photos I took:
https://goo.gl/photos/LQqSHpTVSWCXUyU1A
I'll post some more when I'm in the shop and add other details. If I remember correctly, frame measured 52 cm