The movement is now no longer protected by the case. The escapement platform at the top is delicate. Take care not to knock it. If you like, you can skip ahead to the next step to remove it and put it somewhere safe before continuing with this step.

Examining the two horizontal pillars at the base of the clock which connect the front and back plates, you will see that each has a threaded hole for a screw to clamp the movement to the base.

Noting where those screws are, peel back the felt on the base further to reveal the screw holes.

Remove the two screws and put the base aside.