18k Gold Seamaster De Ville advice needed

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Hey guys, I'm looking to make my first venture into the exciting world of vintage watch ownership. I have been looking specifically at this Omega Seamaster De Ville, ref num: 166020SC, 18k Solid Yellow Gold stamped from 750, Cal: 565, 24 jewels, silver dial, plexiglass, crocodile skin strap, Mint condition, 1968, freq: 19800 A/h, power res: 50h. - as shown in the following pictures. However, there is still a lot i need to learn, as I am struggling to source the movement number, which is - 2'4760'295 - as 24000000 numbers seem to be skipped in the omega movement number references?


I'm interested to find out from you guys why it is the case that this set of numbers are missed, as well as to be given a valuation of the watch, considering its apparent excellent condition (looks as if it's been refurbished maybe?).

Thanks.
Edited:
 
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Your attachments are so tiny. Cannot say any thing from them.
 
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Better pictures than this will be required for any real help.
 
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Case and movement look ok. I need a close up on the seamaster font like this

 
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I have requested a better quality close up from the seller. This is the best I can do for now. What do you think?

Case and movement look ok. I need a close up on the seamaster font like this

Edited:
 
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Case and movement look ok. I need a close up on the seamaster font like this


Here are the further additional photos the seller sent me:
 
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Your answer is in the seamaster S and e,s and v in De Ville
And the position of Swiss made

How'd I go @hoipolloi ?
 
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Your answer is in the seamaster S and e,s and v in De Ville
And the position of Swiss made

How'd I go @hoipolloi ?

Well, I can't tell much from the Seamaster text, except for maybe that the first "e" is on a shallower incline on the initial upstroke?
Otherwise the 29th and 31st minute markers are on the outside of the W and D in "SWISS MADE", as opposed to the inside of the W and D on @hoipolloi sample photo.

What does this mean in terms of authenticity / value?
 
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M morpey
Okay nice. What would be your estimated value based on what you've seen?
18k + 565 + hippocampus + box, nice strap and buckle + clean dial and movement = 1800 USD or a bit more, less.

PS.
That is the price for a dial with black onyx insert hour markers. IF they are black painted. 300 usd less, I guess.
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Thanks for that @hoipolloi , you've been very helpful. One final thing with regards to the hour markers, how do I go about verifying whether they are onyx inserts or simply painted? Would that require a professional service? Thanks again for your help.

18k + 565 + hippocampus + box, nice strap and buckle + clean dial and movement = 1800 USD or a bit more, less.

PS.
That is the price for a dial with black onyx insert hour markers. IF they are black painted. 300 usd less, I guess.
 
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Here are black painted and black onyx inserts.

Can you tell?

 
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The first picture is painted? Only the top is black, whereas the second picture are inserts as you can see the black goes further into the hour markers?

Is that right? Interested as is it not possible to paint the difference I see?

Here are black painted and black onyx inserts.

Can you tell?

 
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M morpey
The first picture is painted? Only the top is black, whereas the second picture are inserts as you can see the black goes further into the hour markers?

Is that right? Interested as is it not possible to paint the difference I see?
Yes you are right.
 
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M morpey
Interested as is it not possible to paint the difference I see?

The onyx is actually a insert that is noticeable to the eye when inspecting the watch. You will see this being asked on the forum as not as easy to see in pictures

Great examples by @hoipolloi