Crown for 5112/8 is 24-402402-8
Winding stem is 1837.
Caliber can be 1601 or 1602, (same stem)
If the crown unscrewed from the stem you will need to remove the stem , hold it in a proper pin vice so no damage is done to the stem, apply Loctite to the stem and screw the new crown on very snug...
If you require a new stem, then you will need to cut it to proper length, then do the above steps.
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Sea-Dweller 16600
Day-Date II 218235
Cellinum 5240/6
Speedmaster 125
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