I have always loved old mechanical devices.
Those old overcomplicated record players, to flip dot matrix signs, i have always wanted to make somthing that "clicks" .
So, why not try to make a relay clock, and use it to drive some old nixie tubes? 
No ICs, no transistors, just relays and diodes like the old days.
I can't say that i know mutch about old computers, and the only thing i have used relays for is simple on/off switches.
So i was wondering if enyone could point me in the right direction/ draw some schematics, or go into simple theory on how one would build such a device.
Like, if i somehow make a binary counter, how do i make it "turn around" at 60, and not 64?
Many thanks
Magnus