...my recommendation is to remove the watch before winding so you don't put any lateral (bend) force on the stem, be smooth and steady on the crown, there's no reason to go fast and that way you'll be able feel any increase in resistance. When you feel it increase, stop. It's wound.
It doesn't need to be babied, but nor should you be over-enthusiastic.
I don't think you can break the stem with the above advice, even with a large diameter crown.
including the Simplicity.
Hi, John,
You've gotten good advice so far; follow it and don't worry so much.
Cheers,
TM

) and it is written by Walt Odets: