The servos I am playing with at the moment are cheap little 9g ones, although I will use best quality ones on the final product. The clock will have 4 hands, one on each servo, and they are all separate. Mechanically, I have it all sussed. I will only need 120º sweep on each servo, so I'm guessing 2º movement for each minute and second and 10º sweep for the hours. The AM/PM hand can be 30 or 45º. I will send you a rough picture if you are interested.
Sounds like an interesting project and depending on the artistic form achieved could be an attractive clock. However as Paul mentioned you really could use the help of adding a real time clock module that would allow the clock to be able to start-up knowing the correct time and move the servos to initial their proper starting position.https://www.sparkfun.com/products/10160