Yes, it can be popped off. Just be carefull not to scratch the case as it is plated steel .
-Firstly take out the stem and perhaps the other crown if possible
-Then pry off the front bezel, crystal stays in the bezel
-Carefully press the movement out on its rotor, dont flip the watch and let it drop in your hands (as the hands are fragile)
It's difficult. I tried, but i think someone with experience has to do it. Not a job for newbie's Thanks for the advice though.