What's the oldest piece of tech you still have running?

AKAI S-1100 sampler. It is still in mint conditition, released in 1990. It was a studio standard in those days. I don't use it that much these days, but the time stretch on that machine is amazing. For Jungle and Drum & Bass it's an essential piece of hardware imo. The Prodigy for instance had two of them 1100's in the studio and on tour if irc.