Correct Stem for Omega Seamaster 166.032 /168.023 Steel Case

Hi have been looking for the correct stem for a Seamaster 166.032 / 168.023 case and according to the 751 / 752 technical documents there are 2 different stem design styles available:

1- Winding stem length (72205631125):





And what seems to be a 2 piece design (72205631160; winding stem movement part with beak):





Which would be the correct one to go with the OEM stem 069ST42527 ?

Thanks

Thanks! 👍

Can someone confirm if the correct case back O Ring part number is 088NS0600? Saw that number on the Internet but cannot find it anywhere