The file 'Omega Worldtimer – Case Back Opening Tool 3D Printer Model' is (stl) file type, size is 346.0KB.
Out of curiosity I designed this opening tool for a Omega Worldtimer.
Fits snug to the caseback.
Hex is for a 17mm Wrench / Socket.
When the rubber ball fails to open the case back, you can give this tool a try.
Opening the watch is definitely not recommended unless you know what you are doing.
Use at your own risk!
Omega_Worldtimer_Case_Opening_Tool.stl | 1.1MB |