[The Mekon (John Briggs)]

Mike,

I have a couple of Vixen catalogues from 1991. It shows the 102M as a F9.8 achromatic refractor on a super polaris (green) mount with with aluminium tripod. The mount could be motor driven and if required fitted with the "Skysensor 3" controller (as you say, primitive goto). Your 102C could be a few years earlier than this. The guidescope may be the 60M guidescope which are rare and a nice piece of kit. They are fitted with a wonderful single adjustment ring.
Cannot say what it would be worth now. Not a great deal as only the early fluorite vixens can command good money at present.
Wood tripods are worth more than the aluminium ones. Hand controllers where everything works are also rare these days.
I can send you some more info or copy from these catalogues if you wish. One is in English, the other is the Japanese equivalent. Only the Japanese version gives the price of each item (in Yen).

There may be others out there with more knowledge than I in older Vixen stuff, I really like early vixen and consider it the successor to Unitron (and better as well)