Vintage Omega Ladies 18k Diamond Watch ID Help, c.1940

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Gimic68

·Aug 10, 2026

Canuck

Take this monstrosity and dump it, would be my suggestion!

Wat-1

ok so think of this if it’s genuine which it isn’t
Why would a brand make such an expensive watch and not advertise themselves with their brand stamped on it, why are they trying to be omega ? Lol

I think you misunderstood. I do not believe that this is an Omega original watch. The point is that this watch was manufactured in 18 k white gold with real diamonds in brilliant cut obviously with a bracelet structure that the watch ErichKeane in his thread "Help identifiying Vintage 18 k Omega Ladies Watch Movement Serial #895523" displayed too, but that one was not 18k neither Omega. Mine is 18k and has all the mentioned "red light" NOT OMEGA signs, but is the first genuine 18k gold diamonds ladies watch with "red light" number 16203 I have come by. Besides correct hallmarks...

 

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Canuck

·Aug 10, 2026

Get this into your head. The watch is NOT 18 karat gold. Whoever tested it and told you it is 18 karat gold is an imbecile! Was the same duffus that told you the stones were diamond! Get real!

 

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redpcar

·Aug 10, 2026

Ask yourself: If I know this watch is a counterfeit Omega with a cheap movement inside, would the manufacturer really go through the trouble of using real gold and diamonds?

We see this all the time. It is 100% not Omega. 100% fake gold. 100% fake diamonds. The watch was sold to tourists for a few dollars on the streets of NYC in the '70s and '80s.

 

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gatorcpa

·Aug 10, 2026·ΩF InvestiGator

Why is everyone going back and forth with this guy?

Just point him to the 1971 article on Counterfeit Watches:

https://books.google.com/books?id=f...e&q=popular science counterfeit watch&f=false

There is a sidebar that discusses fake Omegas.
gatorcpa

 

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Porteroso

·Aug 10, 2026

I still say sell it to the jeweler who tested it.

 

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ErichKeane

·Aug 10, 2026

I too VERY much doubt this is actual gold. This is a road-side fake watch, and I can't imagine anyone would put real gold into that. So either your watchmaker's acid test is wrong, or it was plated for some reason? I GUESS I could imagine it is a bit of a 'high effort' case where someone put real diamonds on it? Those diamonds are small enough to be 'point weight', and presumably not particularly valuable.

The movement on that is PARTICULARLY low-effort however, which makes me doubt all of the above. I'm guessing the acid test didn't work right.

I suggest @Porteroso 's suggestion: IF the jeweler said its real, sell it to him for melt value. At worst, you're getting 'correct' value (minus his cut). At best, you're selling him pot-metal for real money.

 

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bubba48

·Aug 10, 2026

redpcar

We see this all the time. It is 100% not Omega. 100% fake gold. 100% fake diamonds. The watch was sold to tourists for a few dollars on the streets of NYC in the '70s and '80s.

Even on Italian streets and service stations

 

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redpcar

·Aug 10, 2026

gatorcpa

Why is everyone going back and forth with this guy?

Just point him to the 1971 article on Counterfeit Watches:

https://books.google.com/books?id=fQEAAAAAMBAJ&pg=PA54&lpg=PA54&dq=popular+science+counterfeit+watch&source=bl&ots=JTPLWoAFSg&sig=cVul1eDwCSYxCgbohU4cBYKrd7U&hl=en#v=onepage&q=popular science counterfeit watch&f=false

There is a sidebar that discusses fake Omegas.
gatorcpa

My god! I clicked on the unsearch and went down the 1971 rabbit hole of what is to come. Turn my black and white tv in to color? Make myself 2-6 inches taller for $6.98? Watch my Super 8's on tv!

 

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Duracuir1

·Aug 10, 2026·Never Used A Kodak

From @Tony C.

Gimmick!

 

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noelekal

·Aug 10, 2026·Home For Wayward Watches

Omega did not stamp their external case backs with these markings, which are deliberately placed there to fool the unwitting. Fineness was not displayed externally at all on solid gold Omega watches.

 

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theluckyluke

·Aug 10, 2026

The longer the post, the bigger the disappointment when pictures finally show up 🤣

 

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gatorcpa

·Aug 10, 2026·ΩF InvestiGator

noelekal

Omega did not stamp their external case backs with these markings, which are deliberately placed there to fool the unwitting. Fineness was not displayed externally at all on solid gold Omega watches.

Need to stay away from absolutes with Vintage Omega.

Many US National production cases have fineness hallmarks on the case back. Just not imitation Swiss hallmarks like OP’s

US hallmarks are simple “14K Gold” is typical.
gatorcpa

 

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Canuck

·Aug 10, 2026

gatorcpa

Need to stay away from absolutes with Vintage Omega.

Many US National production cases have fineness hallmarks on the case back. Just not imitation Swiss hallmarks like OP’s

US hallmarks are simple “14K Gold” is typical.
gatorcpa

For goodness sake @gatorcpa , try not to encourage the OP.

 

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JimInOz

·Aug 10, 2026·Melbourne Australia

Gimic68

I am particularly interested in identifying the case maker (Poinçon de Maître hammer-head No. 12)

There is no registered maker with a No 12 mark.

As pointed out by many others, the watch is a well recognised counterfeit. There is absolutely no doubt about that fact.

Any person with the slightest knowledge of Omega watches would have immediately recognised it for what it is.

 

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gatorcpa

·Aug 10, 2026·ΩF InvestiGator

Canuck

For goodness sake @gatorcpa , try not to encourage the OP.

More encouragement:

Don’t know what else I can do.
gatorcpa

 

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padders

·Aug 11, 2026·Oooo subtitles!

Gimic68

Tested with acid by jeweler, same for the diamonds with menitoned tester, cut of diamonds is round brilliant cut.

That isn’t round brilliant cut diamond. Too few facets. It is either cz or glass probably formed in a mould. Your priceless family relic is a cheap fake made of brass or steel sadly.

Edited: Aug 11, 2026

 

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Davidt

·Aug 11, 2026

I would get a second opinion on the metal as I don’t think it’s 18ct gold at all. An actual invasive scratch test that penetrates any plating.
If at that point someone is willing to pay you scrap value for it I would gladly accept if I were you.

 

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Canuck

·Aug 11, 2026

Gimic68

Dear Mark020,

Many thanks for your kind and valuable advice.

As far as I know, this genuine 18k white-gold watch with diamond bezel is the first example I have seen with a 16203 mark (a red flag), while also carrying the correct Swiss Helvetia hallmark for 18k gold produced outside Geneva (right) and Poinçon de Maître collectif No. 1, hammerhead without handle No. 12 (left). This mark was registered in 1926 but does not appear in the centralized 1934 records.

The original Omega 19.4 T1/T2 movement (1930/1935) may have been replaced later by an AS 1156 or EB 1333 (-66 or -74).

As for AI, I used it to translate the thread from my native language into English and to help structure the text.
I’d be interested to hear what I could have done better in presenting my findings.
(Disclaimer: Translation by AI)

If wishes were horses, beggars would ride!

 

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Radiumpassion

·Aug 11, 2026

This was next level trolling IMO fed into an AI model

 

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GeorgiosK

·Aug 11, 2026

Am I the only one who finds this thread entertaining, in addition to educational for newbies like myself?