Thank you so much
verktyg !! Such great info! Pretty happy to see I got something of a rare model.
I have begun my resuscitation of this old frame: I straightened and cold set the rear dropouts to the correct 122mm and improved the seat tube, but I still don't have the correct seatpost yet. I've also got a replacement jubilee derailleur on the way and some replacement odds and ends for the brakes. Unfortunately the stem is cracked, and the bottom bracket cups and spindle need replacing, though it came out surprisingly well. It'll be a slow rebuild as I acquire parts and I probably won't get around to paint and chrome til summer.
Thanks again for all the input!