Most of the car clocks back in the dark ages were spring-wound- - - -at least the ones that didn't contain sand! It was wound by a magnetic coil and a set of points- - - -when the coil energized, it wound the clock spring every time the points made contact. To wind the clock initially if it was allowed to run down, we would repeatedly touch a battery cable terminal to the battery post which energized the solenoid several times and tensioned the spring. You'll need to use a resistor with enough value to avoid overloading the small magnetic coil- - -that might take a little experimentation to get the value right.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!