I saw this frame a while back. My impression was that it's a general purpose road/track frame from the late 60's to early 70's. The top tube length is longer than the seat tube length as was the fashion then. Some stock CB headsets had a small <=32mm stack height so the replacement choices are few, thus, the chewed-up DA headset lacks a spacer. Also from that era are the very long and gently sloping seat stay caps. My guess is that it's a CB Olympic. A resprayed Olympic.
Looking for pics on the Google, I see that Bike Forum's rhm owns a similar CB
http://www.bikeforums.net/singlespee...ing-one-2.html
rhm's bike is really beautiful.
Apologies to rhm for not being able to quote & link very well.
If it is an Olympic, I'd want to restore it. I'd be comfortable paying CAD $200.
However, a mid-eighties Miyata is a different frame with steeper angles, shorter wheelbase and from CB's catalogs quite "nippy".
I've learned the little that I know about CB's at
Holdsworth Bicycles
Don't confuse my Bike Forum's ID with great CB wisdom!