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I am in the process of swapping my  second NH05 movement into a Seiko 4205.  The fit together perfectly.  However on one of the new movements when I push the crown/stem into normal position and screw the crown down I get a grinding sound and visible motion within the movement.  It does this both in and out of the case.  Any thoughts on what is going on and how to fix?  

Thank you.

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