What's Wrong Here?

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🍿
 
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Don't all the sub-reference numbers follow the hyphen? I don't know that I've ever seen the SC ( Central, sweep seconds ) designation between the ref and sub-ref numbers.
 
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Re: order of SC and year...

Here's an SGR (which I've learned stands for Samuel Graber, S.A., of Renan) case from a sales post from a few years ago: https://omegaforums.net/threads/constellation-14900-black-pie-pan.129888/


And a CB (Centrale Boites) case from another sales post: https://omegaforums.net/threads/a-lovely-omega-constellation-14900-62-sc.49597/

I've read that HF (Huguenin Freres) made cases for this reference, too, but I can't find any examples, so I'm not so sure.
Edited:
 
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I think the caseback (and case) are made by 2 different manufacture: CB on the right and SGB on the left. That's probably why you can see difference on the engravings of the 2.
 
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I think the caseback (and case) are made by 2 different manufacture: CB on the right and SGB on the left. That's probably why you can see difference on the engravings of the 2.
👍
 
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^
So both are legit ?

If so I fall on the trap too as I thought the right example was wrong (specially due to the stars …)
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Hope I am not stepping on this excellent thread. Thought it would be worthwhile adding an excellent, crisp example:

 
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I'll check back sometime later when the answer is revealed.
 
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To my untrained eye, the one on the left seems to be the real example. The one the right has the following issues: the stars aren’t crisply edged 2) the raised conservatory opening in the center is too thin below the window opening 3) the widow opening is dimensionally inaccurate 4) the dome of the conservatory to the right of the window is asymmetrical (i.e it isn’t a dome).

While I’m probably wrong, I’d never get to the markings on the inside of the case…if i did, I’d say the one in the left has been stamped (and correct) and the other engraved. The one in the right has some lettering size inconsistencies. I know nothing of the numbers themselves.
 
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OK I’ll take a more serious guess… to my knowledge these cases were stamped into shape and not molded. The first two examples don’t seem to have enough definition to have been stamped. The third example posted has a very definite and crisp inner ring which I assume would imply a proper stamped example.
 
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As has been noted previously, the casting of the observatory and stars is not up to standard on the right hand caseback, but, also, from my research on OF, I find that 14900 62 SC is one of the most commonly faked Omega caseback references. What I haven't been able to verify is if all 14900 62 SC CB marked cases are fake or whether there are just a lot of them that are fake - certainly enough to arouse suspicion.

https://omegaforums.net/threads/14900-62-sc-constellation-pie-pan-advice.28162/page-2

Edit: I'm now thinking they might both be fake. All the 14900 SC 61 I can find are marked 14900 SC - 61 (with a hyphen) and made by SGR whereas the photo posted by @X350 XJR although marked SGR, has no hyphen.
Edited:
 
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I’ll take a wild guess! No waterproof or constellation stamp and possibly most constellations ore snap on case backs?
 
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I’ll take a wild guess! No waterproof or constellation stamp and possibly most constellations are snap on case backs?
 
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As has been noted previously, the casting of the observatory and stars is not up to standard on the right hand caseback, but, also, from my research on OF, I find that 14900 62 SC is one of the most commonly faked Omega caseback references. What I haven't been able to verify is if all 14900 62 SC CB marked cases are fake or whether there are just a lot of them that are fake - certainly enough to arouse suspicion.

https://omegaforums.net/threads/14900-62-sc-constellation-pie-pan-advice.28162/page-2

Edit: I'm now thinking they might both be fake. All the 14900 SC 61 I can find are marked 14900 SC - 61 (with a hyphen) and made by SGR whereas the photo posted by @X350 XJR although marked SGR, has no hyphen.

I'll have another punt if I may:
1. As pointed out by @140dave the size and position of that stars in the right top caseback are out (stars too close to the border) and the whole logo appears polished instead of flat, although I suppose that could have been the result of over-zealous polishing.
2. As well as being a 14900 62, the As in the right bottom caseback are pointed instead of flat-topped.

So if the postions (right/left) are unaltered then the right hand one is fake, but I'm still not sure about the missing hyphen on the other, so the left may be a fake as well.
 
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This was fun.

So the one on the right is a counterfeit, the most obvious tell being the stars and the observatory and the perlage on the inside. The left one and the third photo I added are correct and genuine.

For some more education these screen shots are from Desmond's blog, unfortunately the link to the pdf file no longer seems to work, this is from my saved copy.

So tell us what's up with the two movements at the very bottom of the page?
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Thank you @X350 XJR , I now know much more about Omega Constellations than I did before this thread, particularly 14900s.
 
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This was fun.

So the one on the right is a counterfeit, the most obvious tell being the stars and the observatory and the perlage on the inside. The left one and the third photo I added are correct and genuine.

For some more education these screen shots are from Desmond's blog, unfortunately the link to the pdf file no longer seems to work, this is from my saved copy.

So tell us what's up with the two movements at the very bottom of the page?

Thank you for sharing.
Regarding caliber question I think 24M in serial range is very suspected for a 561.
 
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This was fun.

So the one on the right is a counterfeit, the most obvious tell being the stars and the observatory and the perlage on the inside. The left one and the third photo I added are correct and genuine.

For some more education these screen shots are from Desmond's blog, unfortunately the link to the pdf file no longer seems to work, this is from my saved copy.

So tell us what's up with the two movements at the very bottom of the page?
Thank you for putting this together, very informative. Good alert when considering one of the oft faked cases to examine very closely!.

Question- is there a way to recover many of the essays that are not available now on Desmonds blog? I come across this disappointment often.