2500c - no service in 16 years

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I'm looking at buying what appears to be a NOS Planet Ocean from 2007. I assume it has the 2500c movement based on the date wheel font.

Timegrapher shows -1spd and 308 amplitude with 0.3 beat rate error. Seems like it's running very well? Would you try to negotiate servicing?
 
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Yes. If it has been sitting for 16 years, the lubricants have long since dried up. At a minimum, the movement needs to be disassembed, cleaned and relubricated.
 
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Yes. If it has been sitting for 16 years, the lubricants have long since dried up. At a minimum, the movement needs to be disassembed, cleaned and relubricated.

and it’s safe to assume since the red dot is intact on the case back that it hasn’t been touched, correct?
 
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I have the same watch from 2010 which was a safe queen until 4 months ago. No service keeps time to 3s/day. I will get it serviced eventually.
I wonder how much synthetic lubes dry out in a modern dive watch that the crown hasn't even moved and was not subject to shocks or temperature changes?
 
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I have the same watch from 2010 which was a safe queen until 4 months ago. No service keeps time to 3s/day. I will get it serviced eventually.
I wonder how much synthetic lubes dry out in a modern dive watch that the crown hasn't even moved and was not subject to shocks or temperature changes?

Make no mistake.
The watch lubes have lost their ability to do their job and have probably migrated away from their specific lube points also the lighter elements have evaporated and what's left behind has oxidised.

In summary. The movement is running dry and has been for quite a while.
To losely quote a reputable watchmaker, a Co-axial can be in need of a service and for all intents and purposes running just fine whilst beating itself to death.
 
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Who has 'NOS' of that watch? No way it wouldn't have sold in all this time. That's a real find. Out of interest, what are they asking for it?
 
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If it hasn’t been opened since 2007 it needs servicing. There is of course the possibility it already has been. Sellers routinely lie and I would not take NOS at face value as it’s very rare stuff so described really is.
 
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If it hasn’t been opened since 2007 it needs servicing. There is of course the possibility it already has been. Sellers routinely lie and I would not take NOS at face value as it’s very rare stuff so described really is.
Amen. I’d negotiate a service cost discount into the deal, then I’d get it serviced immediately.
 
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Make no mistake.
The watch lubes have lost their ability to do their job and have probably migrated away from their specific lube points also the lighter elements have evaporated and what's left behind has oxidised.

In summary. The movement is running dry and has been for quite a while.
To losely quote a reputable watchmaker, a Co-axial can be in need of a service and for all intents and purposes running just fine whilst beating itself to death.

That's what I thought too, recently bought a 2255.80 which was sitting in a safe since 2001. Sent it straight to a watchmaker who said that the lubrication was still intact and the watch passed a pressure test at 30bar with the original gaskets. Leads me to believe that if the watch hasn't been used, the lubrication doesn't deteriorate. I would assume that older lubrication of vintage watches would behave differently.
 
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and it’s safe to assume since the red dot is intact on the case back that it hasn’t been touched, correct?

Not 100%, watchmaker opened my watch and left the dot intact. He only inspected the movement without taking anything apart so perhaps that's why he left it.
 
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That's what I thought too, recently bought a 2255.80 which was sitting in a safe since 2001. Sent it straight to a watchmaker who said that the lubrication was still intact and the watch passed a pressure test at 30bar with the original gaskets. Leads me to believe that if the watch hasn't been used, the lubrication doesn't deteriorate. I would assume that older lubrication of vintage watches would behave differently.
When I bought mine the PO said his watchmaker had opened it up and saw no need to do a service either.
Still, I may as well take it in for service this year.
I have decided to not change it to "D" spec.
 
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Red dot is original build and a light blue dot is Omega service.

It’s a drop of paint on an oiler and usually placed so it won’t rub off but shatters when the back is opened.

My planet ocean had a red dot and got a blue one after Omega service.

Now, if the watch is truly NOS and never been opened, there is collector value not unlike a classic car with the window sticker and seat bags in place… can’t be many like it.
 
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That's what I thought too, recently bought a 2255.80 which was sitting in a safe since 2001. Sent it straight to a watchmaker who said that the lubrication was still intact and the watch passed a pressure test at 30bar with the original gaskets. Leads me to believe that if the watch hasn't been used, the lubrication doesn't deteriorate. I would assume that older lubrication of vintage watches would behave differently.

Noted👍
Thanks for the feedback😀
 
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No service in 16 years……….sounds like some shops I know of! 😁
If it was 160 years then in would be more like the service counters of government departments!
 
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the red dot can be replicated...

Yes. That’s why Omega hasn’t used the red or blue dots since the middle of 2015.

In addition, I’ve seen red dots that split when the case back was opened, and when the case back was closed up again, it lined right back up and you couldn’t tell it had been opened.

The dots are in no way a reliable indicator of anything...
 
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That's what I thought too, recently bought a 2255.80 which was sitting in a safe since 2001. Sent it straight to a watchmaker who said that the lubrication was still intact and the watch passed a pressure test at 30bar with the original gaskets. Leads me to believe that if the watch hasn't been used, the lubrication doesn't deteriorate. I would assume that older lubrication of vintage watches would behave differently.

Interesting concept and I'm sure this subject has the potential of opening up many debates...
 
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Now, if the watch is truly NOS and never been opened, there is collector value not unlike a classic car with the window sticker and seat bags in place… can’t be many like it.

This isn’t a rare, survivor classic car 50 years down the line though - this is a mass produced and incredibly common modern omega dive watch.

It’s perhaps the NOS equivalent of a 2007 VW Golf.

And even if it were a GTI or an R, the people willing to consider it “special” today because no one drove it are fairy few and far between.