Star inside 2505-29 caseback meaning?

Spoonta66 · Jan 4, 2026

Hi all,

Just cleaning and servicing a few of my Omega collection and saw something I have never noticed inside the caseback of my 2505-29 caseback. Underneath the reference number is a star stamped into the caseback. I went through 15 other vintage Omegas in my collection and this is the only one is appears in.

Any idea in what it means?

Vitezi · Jan 4, 2026

Spoonta66
Any idea in what it means?

The general consensus is that it's the mark of the Swiss casemaker Sandoz & Breitmeyer.

https://omegaforums.net/threads/star-in-caseback.18600/

Thread 'Star in caseback?' ·

I recently have purchased this black dial 30 mm. Omega and wondered about the star under the ref. Any ideas?

Ref. 2639-14
Cal. 266
1953...

tdn-dk · Nov 15, 2014

https://goldammer.me/blogs/articles/steel-vintage-watch-case-maker-guide

Star inside 2505-29 caseback meaning?

Spoonta66

Vitezi

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