Calling Our Omega Vintage Dial Experts

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So I have a bit of a mystery with my 1961 Seamaster 14761. Upon examining the curtain dial of this watch under magnification, I saw this when I viewd the 8 o'clock marker under magnification:
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As you can see, about half of the inlay is missing - barely visible to the naked eye, but it's there. The watch has absolutely no reaction whatsoever to UV light, so I am assuming that whatever the inlay material is, that it can't be a luminous compound like radium or tritium. To my knowledge, Omega only used three materials for marker inlays - onyx, rubber and black paint. This watch is too early, I think, for the cost cutting era of black paint and, in any event, the "break" looks too clean for that. I'm thinking that it must be onyx, but I'd like confirmation or correction from some of our experts. If it is onyx, any idea where I can procure a replacement? My recollection is that the onyx inlays are friction fit and that a watchmaker simply slides them into place. Thanks in advance for any assistance.
 
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I would say your best bet is to find a similar dial totally knackered and cheap, onyx will not be degraded by humidity and may well be the only part surviving. You will need patience and wait for the right combination of low cost-usable parts.
Then you may want to swap the whole index, that is fixed with metal feet to the dial.
 
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I would say your best bet is to find a similar dial totally knackered and cheap, onyx will not be degraded by humidity and may well be the only part surviving. You will need patience and wait for the right combination of low cost-usable parts.
Then you may want to swap the whole index, that is fixed with metal feet to the dial.
That's certainly an option, but if I can confirm that the inlay is indeed onyx, I'd rather try to source just the inlay if possible. I don't really want to mess with the dial any more than I have to. This watch has one of the most pristine curtain dials that I have seen, they aren't easy to find, and I really don't want to tamper with it any more than I need to.
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I don’t know about rubber (I’m not sure that has ever been proven) but Omega also used jet for inlays.

However, IIRC this was later in the ‘brutalist’ style indices of the mid and late 60s.

A bit of a PITA but it might be an idea to get the crystal off and either look at the end grain of the remaining inlay under high magnification or better yet remove the remaining piece to see what it is made of.

I agree I wouldn’t mess with your special dial.

Your best bet, once you’ve found out what it is made of, is to find another knackered Seamaster dial with similar ‘lozenge’ shaped indices and transfer the inlay from that one to yours.
 
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It wasn’t noticeable until you pointed it out. All the attention goes to that dial and those hands. Beautiful piece! I’d ride it as is until the right opportunity to potentially correct it comes along. You are the only one who will ever see the imperfection on this gorgeous example.
 
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It wasn’t noticeable until you pointed it out. All the attention goes to that dial and those hands. Beautiful piece! I’d ride it as is until the right opportunity to potentially correct it comes along. You are the only one who will ever see the imperfection on this gorgeous example.
Thanks, Rick. The thought occurred to me when I first discovered it. It's pretty much invisible to the naked eye. Sometimes the best thing to do is nothing.
 
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Thanks, Rick. The thought occurred to me when I first discovered it. It's pretty much invisible to the naked eye. Sometimes the best thing to do is nothing.

This.
 
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Sometimes the best thing to do is nothing.
Better yet, throw away your magnification tool, and memorize the #1 rule of vintage collecting: Never look at your own vintage dials under a loupe 😁
 
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Well, I suppose that I could always remove mine! 😁
 
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I know that you don’t want to see that imperfection spot anymore.
So, please send it to me. 😲
 
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I know that you don’t want to see that imperfection spot anymore.
So, please send it to me. 😲
Nice try, Teerapat. It doesn’t bother me THAT much. 😁
 
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I feel lucky because mine doesn't have inlays.

I have slightly different indices but thankfully no inlays either
 
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You need the professional set- you’re welcome.

Lol, right. I may also need a prescription to treat Obsessive Compulsive Disorder. 😲
 
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I fixed one arm on my glasses. Sliver of wood, trimmed and sharpie marker to match

shave a sliver of wood to fit, trim and colour as mentioned with a sharpie. Use glue to hold in place