Some of the wheels will be blocked from being removed by others. Starting with one which is not blocked at all, lift them all off in turn and put them aside in order of removal. Take another photo after removing each one.

Finally, remove the drum containing the main spring.

Two more wheels remain, secured to the front plate by a screw. These form the reduction gear between the minute and hour hands. Remove the retaining screw and lift the wheels off.

On the back of the back plate you will see a small piece of brass with two screws in it. One of these, covering the contrate wheel pivot hole, is an end float adjustment for the contrate wheel. Do not adjust this. The other attaches it to the back plate. Remove this screw and put the brass piece aside.

Another brass piece secured with a screw covers the ratchet wheel. REmove this too.

The clock is now fully disassembled. Take another photo of all the bits so that tomorrow you can brag to all your friends about how you got it all back together again!