Check out these very cool old clocks, I don't think they are LED's I'am sure its a Panaplex display in them.
Panaplex is a type of high voltage neon display which glows orange, I've got a few old calculators with them, they are the best type of digital display I've ever seen.
The Heuer Catalog is indeed interesting. I second that, the display most probably isnt LED. My dad had a clock from that era with what i think was the same display. On my dads clock the intensity could be regulated, so the display could be set darker or lighter.
950$! AT least it were two of these. :wink: Very nice and stylish clock!