This Marble Clock was made as a wedding present for my very good friends; the Grubersmiths.
You read the time from the number of marbles stored in the rockers, working from bottom to top. In the first video you can see the time changing from 9:39 to 9:40
The clock is powered by a synchronous motor which runs off a 12V mains adapter.
I've had this design mulling away for years now since first seeing the black plastic "Time Machine" in a shop window. I've since seen a number of variations of this design in wood and but none of them ever struck me as particularly elegant.
This design is partly inspired by some of the beautiful clocks made by Clayton Boyer (http://www.claytonboyer.blogspot.co.uk/) and thanks to Matthias Wandel (woodgears.ca) for use of the wood gear template!