Thanks for taking the time to reply, much appreciated. Sounds more complicated than what I remember the rep saying at the time.
I had a vision of a "normal" framebuilding set-up (like we had at Cliff Pratt's in the basement) but with an Argon gas cylinder sort of "blowing" the inert gas at the weld whilst it was being formed........
When I bought my modern Basso last year I looked at titanium frames by the likes of Van Nicholas but nothing as complicated was mentioned. I guess joining titanium tubes has changed over the years. The only one I fancied was the Enigma Esprit as it looked like a real bike and not some sloping top tube compact http://www.enigmabikes.com/bike/bike-enigma-esprit.html
Just out of curiosity, were you employed by Speedwell?
PS thanks for not locking the thread John.
I have been able to review this thread with my father who developed the speedwell titanium frame.
Very early on in the evolution of the speedwell titanium frame, the first frames produced in very small numbers were called mk I frames. These did not have the same degree of finishing applied to them that the latter mkIII frames had. The images that I posted up were of the mkIII frame, which had a very highly polished finish. It is highly likely that you had a very early mkI frame in your shop. I will try and get some images of a mkI frame to post up to show how the mkI frame looked. These were only produced in very small numbers and as such are very rare indeed. Such a pitty that you did not keep hold of one.