Omega Seamaster 300 military issued case back

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As above looking for an issued case back for my military Seamaster 300. I know this is a tall ask but you never know! Thanks
 
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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.
 
Posts
432
Likes
334
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!