I've played with these over an over send it to Clock Works they will redo it all and get it fully functional restore and clean it for like $69 unless parts are pitted that additional expense broken lenses etc. When you get it back just drop it in and you are up and running... They do excellent work
Here's the link:http://www.clockwks.com/Shippingx.html
I know the clocks are different, but does the great clock info posted on this thread apply to the workings of a 56 Bel Air dash clock as far as how it operates and is wired? Have not taken it out since it seems to have a mind of its own and works periodically and I don't want to destroy it completely.
Guys I took mine out, took it apart, took the works to an old watch maker and he got it working great. I reversed the colors to a white face with black numbers and it looks great in the car. there is only one wire on the back.