Hi there,
I have a Speedmaster 105.012-66 HF. A beautiful watch! However, there's is one awkward thing and that is a missing Omega symbol on de bridge of the balance wheel (right beneath the place where adjustments to the speed can be made). The watch is in good condition and case, caseback, movement, dial and hands are true for the period wherin the watch was made. Does any one have experienced this or heard of a similar case?
Thanks, Jeff.

 

How about looking here?
(You know things are bad when I’m commenting on Speedies )

 

I am sorry. I am new on thuis forum. Can you please explain what you're trying to say here? I have a missing symbol andere hope someone can help me with that's. Humor is okay when it is helpfull. In thuis case it isn't.

 

Hopefully someone more helpful will be along soon. If that's the best this member can do I am glad to have missed his other 2545 posts.

 

Your 321 calibre marking (along with the Omega symbol) is just below the area you show and underneath the balance wheel.

Believe that’s all correct.

 

Look under the balance wheel...

Also, maybe have a look at @Peemacgee's contributions to this forum before firing away about his helpfulness. One of the most friendly and helpful members around, just mostly on questions about Constellations.

 

Appreciate the comment @ConElPueblo
To be fair - my bad as the yoof of today might say.
I was trying to be helpful in pointing out the 321 on the movement but didn’t answer the OP’s question about why it wasn’t on the regulator ‘bridge’.
Note to self “don’t comment on Speedies”

 

Referring to the case, the bezel is not from the period, but a later service part. You could look for a correct DON bezel or a contemporary alternative (Telemetre, Decimal, Pulsations).

But first of all enjoy your nice watch with its cal. 321 movement!

 

It's not the correct DON for a 105.012, but it might be a legit DNN. We'd need better photos to be sure.

 

Better pictures would be fine, yes. But when I stated that the bezel is a later service part, I didn't mean it isn't legit. It is just not correct for the reference and I was not sure if the OP is aware of this.

 

Indeed the bezel is of a later period (mid '90). Still looking for a replacement. The Omega symbol and calibre underneath the balance wheel were known. It's Just that I am curieus about the missing of it on the balance bridge.

Thanks to all the contributors

 

Are you sure? It looks like a legit DNN in that photo.

 

Yes, we meant the same thing. Most likely it was me who didn't state it clear enough.

 

Sorry, I edited my post. The only reason it matters is that if it is a legit DNN, it actually has some value. A 1990s service bezel has virtually no value. This one has no accent, and a serif 7. I think.

 

If you do a google image search for "lemania 2310", you'll find lots of pictures of this part, in this colour metal, with no stamping/engraving on it.

Suspect someone swapped in what they had/what they could get hold of...

 

(Just for comparison) In the photograph that Swiss Time Services took during it's service, my 105.012-65 has 321 and Omega logo in both places

 

Yes. Of course the '321' is missing on the bridge of the OP's watch.

And looking at the screws of the movement I think that the service history isn't the best. So it's obvious that the original part some day was replaced with what was just at hand.

 

Correct, and that is reinforced by the fact that this balance cock has the old arrow-shaped index. A 105.012-66 should have the streched-lozenge one (A3 in MWO).

By the way, judging from the fuzzy photo the lugs seem more like a CB ...

 

I said "believe that's all correct" up-thread but obviously believed wrong. Was thinking the 321 used marking positions like my 861 Speedy, under balance wheel only. Good to learn about differences but I could have learned without mis-informing by just staying quiet

Sorry about that.

 

And they likely replaced the balance as well, because mixing that regulator style with the later balance for the 321 will cause massive timing errors if left as is...