Help w/ 105.012-66 CB caseback

Killwolf · Nov 17, 2025

Hello all,

I’m seeking your expertise on a Speedmaster I’m currently examining.

The watch exhibits numerous traits of a 105.012-66 CB—including the case with its distinctive flat lug facets, the stepped dial, flat pushers, correct hands, and a Cal. 321 movement (serial 24.96x.xxx). All indicators suggest it started life as a 105.012. However, the case-back—bearing the CB hallmark—has been re-stamped as 145.012 SP, with the original reference removed.

I’m trying to understand the significance of the CB stamp and what it represents.

Any insights or thoughts on this would be greatly appreciated!

Aludic · Nov 17, 2025

Hi!

You’re not alone. There’s multiple examples of this, suggesting it was done centrally, possibly at the factory. A similar case(back) has been discussed here: https://omegaforums.net/threads/a-s...ase-cant-be-right-can-it.183754/#post-2485309

Could you share a picture of the outside of the case back please?

Curious to learn more.

Killwolf · Nov 17, 2025

Sure, here you go

Killwolf · Nov 17, 2025

+ another pic where the pushers look also OK for 105.012 (if I am right)

Aludic · Nov 17, 2025

Killwolf
+ another pic where the pushers look also OK for 105.012 (if I am right)

Yup, those pushers look fine. Nice watch in general, I think!

Dan S · Nov 17, 2025

Hands are probably replacements, IMO.

dsio · Nov 17, 2025

There have been a number of references where Omega took excess stock of a given defence case and simply ground off the old reference and stamped a new one.

The 198.xxx Omega tuning fork models that share cases with automatic variants springs to mind in that respect.

They did it in exactly that way too, grinding off the old reference and stamping below it.

Killwolf · Nov 17, 2025

Dan S
Hands are probably replacements, IMO.

The seller is seller they have repainted but I dont know if he is right or saying craps. He sent me pictures of the hands prior to maintenance (see below). But I am ok with hands given the price I can handle it.

It is this caseback, I understand the previous reference caseback re-used for the next reference models, but here it looks like we have a 105.012 case band / dial / movement / bezel / everything seems to match but this caseback which is a 105.012 re-stamped into a 145.012. A bit weird.

But then again, I may accept it since in the end it is a 105.012 caseback (although restamped)

SOG53 · Nov 17, 2025

The case is nice clearly CB (Centrale Boites, casemaker) with facets, and inside caseback is CB stamp. Rest of watch is fair with hands repainted, just be aware if you buy it and wish to resell later, there will be uncertainty regarding the case markings which may impact price. What is asking price?

Dan S · Nov 17, 2025

Killwolf
The seller is seller they have repainted but I dont know if he is right or saying craps. He sent me pictures of the hands prior to maintenance (see below). But I am ok with hands given the price I can handle it.

It is this caseback, I understand the previous reference caseback re-used for the next reference models, but here it looks like we have a 105.012 case band / dial / movement / bezel / everything seems to match but this caseback which is a 105.012 re-stamped into a 145.012. A bit weird.

But then again, I may accept it since in the end it is a 105.012 caseback (although restamped)

Yes repainted. The green lume also doesn’t look original to me. Can be redone obviously if it bothers you.

Killwolf · Nov 17, 2025

SOG53
The case is nice clearly CB (Centrale Boites, casemaker) with facets, and inside caseback is CB stamp. Rest of watch is fair with hands repainted, just be aware if you buy it and wish to resell later, there will be uncertainty regarding the case markings which may impact price. What is asking price?

He asks for 5,500€.

On my side this is a watch I want to keep for long time, and it is likely that I will look for original / better looking hands later on and why not re-lume if I can be sure it will be very well done.

What do you think about the price?

Killwolf · Dec 22, 2025

Hello Speedy community,

Just to give an heads-up, I finally bought the watch, considering the pros & cons and the price I considered as quite fair for a 321 but without the right caseback and hands that I will repaint and relume. I managed to find the right caseback in the meantime - special thanks to @DLT222 😉 and I really appreciate the beauty now.

Cherry on the cake, a watchmaker in the place I leave has possibility to relume the hands with T.

hansaboy · Dec 22, 2025

Congrats to your Speedy!

👍👍👍

And please do post some pictures here:

https://omegaforums.net/threads/omega-speedmaster-105-012-66-hf-and-cb-sharing-thread.169609/

Thread 'Omega Speedmaster 105.012-66, HF and CB sharing thread!' ·

Greetings!

This time I was thinking of doing a post/thread where we can share and compare this lovely reference.
The 105.012-66 had two case manufacturers,
Huguenin Freres (HF) and Centrale...

hansaboy · Feb 24, 2024

😀

Killwolf · Dec 22, 2025

hansaboy
Congrats to your Speedy!

👍👍👍

And please do post some pictures here:

https://omegaforums.net/threads/omega-speedmaster-105-012-66-hf-and-cb-sharing-thread.169609/

Thread 'Omega Speedmaster 105.012-66, HF and CB sharing thread!' ·
Greetings!

This time I was thinking of doing a post/thread where we can share and compare this lovely reference.
The 105.012-66 had two case manufacturers,
Huguenin Freres (HF) and Centrale...

hansaboy · Feb 24, 2024

😀

Yes of course, that thread helped me alot, confirming these kind of casebacks were legit 😉

Help w/ 105.012-66 CB caseback

Killwolf

Aludic

Killwolf

Killwolf

Aludic

Dan S

dsio

Killwolf

SOG53

Dan S

Killwolf

Killwolf

hansaboy

Killwolf

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