I would think you need to specify whether with a screw down crown (marked with an "A" before the serial #) or Naiad crown (no "A" before the serial #) on the case back.
I would think you need to specify whether with a screw down crown (marked with an "A" before the serial #) or Naiad crown (no "A" before the serial #) on the case back.
I believe I need a W10 case back but I would be happy to be offered anything!