Removal of a mechanical clock movement is fast and easy. The movement itself is usually only mounted with two flat head screws underneath. These two screws run up into the movements pillar posts and hold it secure to the seat board. The weights and pendulum come off before doing anything to get them out of the way. This is done with a cloth so as to not stain the brass. To get to the point of removing the movement itself the dial and hands need to come off. Consequently, if the clock case is custom made by a woodworker things can get unusual. Furthermore, there are no rules with a custom case and the below trim, case, and mounting notes may not apply exactly.

Removing the Hands
If the clock has a second hand, this is a press fit. All is needed to do is pull it off. There is a knurled nut that holds the minute hand on the clock. Hold the minute hand still while loosening the nut via needle nose pliers by turning it to the left. The needle nose pliers is only to loosen the nut. Then use fingers to remove it. Meanwhile, the hour hand is only a friction fit and comes off by twisting and pulling straight up. All three of the hands are quite simple to remove.

Removing the Dial Trim
The trim that surrounds the clock dial would need to be removed to get the dial off. Of course, this is usually only on with two Phillip head wood screws. Remove these screws and the trim should be able to come off of the clock. It is important to have the hands off of the clock. Some trims slide down the front of the clock dial. Hence, if the hands are in the way the trim may get caught up and bend them. Clockworks does offer new clock hands if they are needed.