Ah, the good ol' Greek Clockwork Calculator, stock filler piece for 1970s "Believe or Not" type shows narrated by Leonard Nimoy and Arthur C. Clarke. People used to say it was a hoax, because they'd always talk about it at the same time as the Crystal Skull (http://en.wikipedia.org/wiki/Crystal_skull#Mitchell-Hedges_skull), but I'm willing to bed the Greeks had a bunch of these calculator things.