Whilst browsing Reddit I found a very cleverly designed electro-mechanical 7-segment clock and thought I'd share it on Element14: the Redit article links to the Youtube video.
[Both links are to external sites]
https://www.reddit.com/r/arduino/comments/p12238/a_clock_i_made/
https://www.youtube.com/watch?v=VU4PSbIvm04
Great work John Burd 