Omega Seamaster Cosmic 135.017 Female Stem Part Help

coreymullins · Sep 26, 2025

Hi all,

I discovered this forum after dropping my ref. 135.017 Seamaster Cosmic and needing a repair. I was able to find a number of male 600-1149 replacement parts for the stem, but what part is correct for the female? I’ve seen a few generic parts for the female, but don’t know what to look for.

WestCoastTime · Sep 28, 2025

coreymullins
Hi all,

I discovered this forum after dropping my ref. 135.017 Seamaster Cosmic and needing a repair. I was able to find a number of male 600-1149 replacement parts for the stem, but what part is correct for the female? I’ve seen a few generic parts for the female, but don’t know what to look for.

I have made good use of this very helpful OF post;

https://omegaforums.net/threads/crown-glass-gasket-list.81619/

Thread 'Crown-glass-gasket list.' ·

Top headers in each colum are-
Case ref / crown ref / glass ref / gasket ref

michael e · Sep 2, 2018

For your 135.017 case ref, I would read this as needing a Crown part 43212 (crown plus female stem).

I believe you can order these new from Otto Frei;
https://www.ofrei.com/page_147.html
(search this page for "135.017")

Good Luck!

Archer · Sep 29, 2025

coreymullins
Hi all,

I discovered this forum after dropping my ref. 135.017 Seamaster Cosmic and needing a repair. I was able to find a number of male 600-1149 replacement parts for the stem, but what part is correct for the female? I’ve seen a few generic parts for the female, but don’t know what to look for.

081ST9992 is the part number for the crown side of the split stem.

Omega Seamaster Cosmic 135.017 Female Stem Part Help

coreymullins

WestCoastTime

Archer

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