The bezel in a Borgel watch is typically friction fit over the outer edge of the pillar plate. You should see an aligning notch that indicates the seam, which should be just above the beginning of the threads. Insert a case knife into the seam, and gently pry the sections apart. Work around the movement to avoid the risk of slipping and chipping the dial.
Then the threaded collar can be removed by finding and removing (or loosening, if they are half-heads) the case screws. These are sometimes on the top, like pocketwatch case screws, but are sometimes down in one of the channels, engaging slots cut into the side of the collar. Once these screws are cleared, you can push the movement from the back, out of the collar.