TRASER 3105 S, 2005
Replacing the bezel...
Place the bezel onto the watch. The four legs of the white "click spring" make sure the bezel will always ratchet exactly at the minute markers. Use your fingers to press down the turning bezel. Make sure the gap between turning bezel and watch case is the same around the bezel.
Then use a case press and a 32 mm bit to press the bezel down. The metal ring inside the turning plastic bezel slides now down and creates that very tight fit. If you have very strong fingers, you might be able to push the turning bezel down with your force. Using a case press with the special recessed bit makes it of course a lot easier and also guarantees that the force is equally distributed over the 360 degrees.