This was a score and a half. One of the Collectors mailing lists
turned up a bloke called Ken Baker who had piles of these machines from the
mid-80s, not only boxed but unused too - this one's only been opened to look
at it, though someone was obviously careless with a box cutter. Cost me an arm
and a leg in shipping mind, but it was well worth it.
2017 update - modern flat screen TVs will quite happily accept
NTSC video signals so today I powered one of these up for the first time ever and
updated the pictures. Sweet.