My schools upcoming musical requires the an analog clock to be on the set. The play is 1940's Radio Hour. It is an hour and a half on the set of a Radio studio, and there is a clock in the radio studio. While it is not 100% imperative that the clock be controllable, it would be very nice as people take time cues off it ("The time is 9:00 *chme*" is in the script). Does anyone know a good way to control an analog clock? I am trying to figure out a way to open the back of the clock up and make a crew member able to change the time, but is there a good way of doing this? Anyone done anything like that?