Nice model. The bezel should have a small notch on the underside into which you can insert a knife blade. Gentle pressure should remove the bezel.
I've got a bellmatic that I also need to replace the crystal for (crystal on the way). I've lifted the bezel but not yet pushed out the crystal. Not sure exactly how things are arranged under the crystal. Did the alarm setting internal bezel come out with the movement, or does it come out through the front?