Gifted 3 vintage Omegas

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I am curious - what is the purpose of blurring out the serial number on movements? What could somebody do with that info?
 
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I am curious - what is the purpose of blurring out the serial number on movements? What could somebody do with that info?
Some people are concerned that scammers may try to use their photos and SN info to try to scam others. On my photo the prior seller did this on the movement photo.
 
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These are amazing watches and the papers just add to the value and intrigue. Very unusual to find! My advice is, don’t try to open the case backs yourself. Unless you have years of experience your can do serious damage to the case, movement, your hands, the table, etc. It is a lot harder to open a watch than you think. Even a rubber ball can do damage. It all happens in a split second and you will wish you could turn back the clock for just that much time and undo the damage but you won’t be able to.
Well unfortunately this advice came a bit too late.
I popped the back off the right one in the pic with two watches.
It’s a 2605-8 with a 265 movement.
I got the back off with no drama. I bought the Bergeon case knife. I don’t have a lot of watch specific experience, but am pretty good with delicate stuff (machinist/ expensive optics)
I started a new thread for the 2605
Thx for the input


 
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Thx for all the replies
SOG53 that’s a nice looking watch, is the black dial original?
My original picture are lousy.
The watch in the first couple pics (with the papers ) is significantly bigger dial than the other two. The pic with the two watches is deceiving because one(left) is on a flex bracelet and sits higher than the leather one in the pics , so looks bigger, I think they are the same size. The one on the flex bracelet has a screw back, the right one is a press back and I now know to be a 2605-8.

The large one with the papers I think I’m going to need a real watchmaker as I don’t see any place to insert a case knife and I didn’t have any luck trying to unscrew it. I suppose it’s possible the movement comes out the front but I can see a seam on both the front and the back side of the case.
 
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If @bardamu suggestion that larger one is 2505, it should measure 38 mm diameter, and it is called Jumbo. It would have snap off Caseback and probably cal 265. I would let watchmaker open if not sure it’s been closed for years and not worth risking scratch.

Here’s a review for 2505:
https://www.fratellowatches.com/omega-reference-2505-aka-jumbo/

2639 measures 36 mm diameter and has screw down Caseback. Yes I believe mine is original dial with some degradation of lacquer layer

2605 would be 35 mm here’s a similar listing
https://vintagewatchspecialist.com/...MQqqZD1cyMJYTWVmZr9oJZIqLYPHjQeV-1nSyul86v9wc

Wonderful trio!! Let us know what you find.
 
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The large one is 38mm
The screw back is 36mm
The 2605-8 is 35.5mm

Thanks for the awesome help!

 
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Well I sent the screw back case to Tim at Omega Addicts for service. Turned out to be a 2639-13 with caliber 266 works.
He did the service and replaced the crystal and it needed a new mainspring. It looks great I think on the light tan (almost ivory band) that he put it on( with Omega buckle)

 
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2639 is one of my favorites.
I did notice you called the reference correctly when I first posted 😀…..nice