Info Zenith 3019 phc tige

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Hi all, does anyone know the winding stem thread pitch of the 3019PHC movement? I can't find the correct stem for the old original crown.
Edited:
 
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Hi all, does anyone know the winding stem thread pitch of the 3019PHC movement? I can't find the correct stem for the old original crown.
Part number 401 I believe. There are a few on eBay