I can tell you a little about how this one came to the UK...
I bought it, oh, 8 or 10 years ago in Santa Clara, CA. I was working out in San Jose and every time I went to the area I'd stop in at the Starving Musician in Santa Clara. I'd bought a very cheap Tele once for $160 - it was a '78 with a great neck but chopped for humbuckers. Anyway, that visit I asked them if they had any steel guitars in. The guy thought they had one at their storage facility, and that they were having a "yard clearout" that day only.
So, off we went rather rapidly, and they had the Stringmaster you see in the pics. Insanely cheap then, and ludicrously cheap now. Of course, I bought it on the spot. I passed on the tube Echoplex which was broken (wish I hadn't..) and my buddy thought I was crazy buying the Stringmaster.
I brought it back to the UK as hand luggage - nice to fly business class
Oh, I sold the Tele last year after refinishing it and adding a '53 repro bridge and pickups for about $1000!
Ian