STEP 1. Determine Your Case Back Type

  
SNAP BACK
If the watch looks similar to this, follow the step-bystep instructions contained in the first section labeled snap back in the menu on the left.
HATCH BACK
If the watch looks similar to this, follow the step-bystep instructions contained in the second section labeled hatch back in the menu on the left.
  
SCREW BACK
If the watch looks similar to this, follow the step-bystep instructions contained in the third section labeled screw back in the menu on the left.
RETAINER RING
If the watch looks similar to this, follow the step-bystep instructions contained in the last section labeled retainer ring in the menu on the left.

DON’T Force any watch parts that do not come apart or move with reasonable ease when these instructions are followed.