How old is this watch

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How old is this watch, or what year is it? I can't find anything like it on the internet. It belonged to my grandfather and it has 25 years service United Fruit Company written on it, approximately how much is this watch worth, I'm just curious, I'm not going to sell it
 
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Take caseback off ,take note of serial number, check omega database, done.
 
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It's a 1960's Seamaster Deville, so roughly 60 years old. For more accurate information, you'll want to get the caseback open to see the serial number on the movement.

Dial has some damage but it looks all original from what's visible in the pictures. Nice watch and great family heirloom. Wear it in good health!
 
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Agree it’s a Seamaster DeVille from the late 60’s. However, I’ve never seen that dial type on that reference.
It’s either a dial swap from another model or more likely it’s been redialed.
 
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Take caseback off ,take note of serial number, check omega database, done.

Get hack saw, cut caseback off, done?
 
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This being an American market watch, dial looks just fine, there are a staggering number of styles.
 
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How old is this watch, or what year is it? ...It belonged to my grandfather and it has 25 years service United Fruit Company written on it
Was your grandfather the employee? If so, I think the best approximation is waiting right there.
 
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KM6292 / LL6287

ca 1968

This one I had complete box papers original strap so I know it was original.

Edited:
 
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I’ll hold my hands up. I’ve never seen that dial on a DeVille before but I’ve had a quick look and found a couple of examples.
 
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Take caseback off ,take note of serial number, check omega database, done.

You give strange advise ..... It opens from the Front. Middle case and case back is one piece. Try to open with your advice will damage the case ....
 
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You give strange advise ..... It opens from the Front. Middle case and case back is one piece. Try to open with your advice will damage the case ....

I'd like a dollar for every Unicoc/Monocoque case I've seen where the back is covered in gouges caused by morons trying to "remove the caseback".

🙄
 
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Take caseback off ,take note of serial number, check omega database, done.

We even have a dedicated paragraph about this in our posting guide, so we don’t have to repeat ourselves:
https://omegaforums.net/threads/vintage-omega-posting-guide.383/

5: Have the Watch Opened ONLY By a Watchmaker, Not Yourself or a Jeweler

For maximum information you should get a professional watchmaker to open the back for you, showing the serial number on the movement and other useful numbers inside of the case back.

Be careful who opens the watch.
If you have a rubber ball you can try to open a screw back case, but otherwise no one should touch the watch except a professional watchmaker.

Do not bring it to a jeweler as they are not specialists, and any metallic tool may cause irreparable harm, such as a deep scratch. Those are not removable, and easily happen when someone doesn’t do it all day.