Seamaster 300

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Ross, have a very close look at the place, where your metal band connects to the case. these military variants should have a fixed metal rod, which is not removable. your band could be modified to keep them in place. or do you see some kind of a shiny steel spring bar, that connects to the holes in your case? and can be removed ( it is spring loaded ) that is quite important for originality.
Hi, Had a good look, the metal rod is most definitely still fixed and hasn’t been removed
 
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Hi, Had a good look, the metal rod is most definitely still fixed and hasn’t been removed

That's what I thought. Excellent ! Another brick in your Wall to riches.... Get rid of that band. Cut it off. Will only damage the lugs. Kind regards. Achim
 
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UK company Phoenix produces the Original NATO strap. 20 mm in dark green will go perfectly with your watch.
 
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Made something that might be useful if you plan to have the bracelet removed. This is one way to do it and avoid damaging the strap bar.
In any case, make sure whoever you take it to doesn't cut it off or replace it with a standard springbar!
 
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The key decision is whether you're going to keep it or sell it. If you're going to sell it, it won't pay off for you to have it serviced at all. A buyer will probably have their own favorite watchmaker and would just as soon use them as one you've selected. Yes, it could bring in a lot of money, but if you don't need the money that badly you might keep it to remind yourself of your great uncle. Once you sell it, it's gone. If you keep it, you could sell it if someday you come on hard times. The watch will probably keep appreciating.
 
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So, the bracelet seems to have been “wrapped around” the fixed bars then.

An extra that would add value in this case is an Omega extract. If it mentions “Delivered to the British Ministry of Defence” it confirms the provenance.

Omega for a while stopped adding these details, as far as I know now they do it.
 
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If you decide to wear it : Your movement service is easy to do. It is a quite simple procedure. You might need parts for the automatic module after all these years . US $ 300 should do that. Your biggest problem is, that a normal , older Watchmaker can do that. But you can not trust everybody with the overall task, not to touch anything else. Especially the dial and hands, that need to be removed and re assembled for that. That is where your value lies. So, some recommendations here will follow. If you want to keep it now, your next step is to take good pictures from the front and back. the crown side. have the back opened and take pics of inner case back and movement with the number. then send that to the factory and request an excerpt from the archives. That will show you, if the movement is still the original. And determine a further step in your value evaluation. New back and crown seal and wear it. Nobody will know, what you have there .... Every Rolex will be dwarfed by it. And then go to your bank and get a safe deposit box for your omega....
 
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Since nobody has said this yet - Don't send it to Omega for a service! They will not respect its originality and may replace parts that should be left. If this were my watch I would send it to someone like Simon Freese or Swiss Time Services in the UK. Not the cheapest but they are the best for Omega and this watch is worth it. That is of course if you are keeping it, otherwise as others have said, sell it as is.

wow, I had no idea it would be that old, it’s was my great uncles who was a military diver. It still works.
Thank you for your advice and I will take it onboard.
::rimshot::
 
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Reminded me.. since no one has said it.. DIBS!
I bet plenty have already said it by direct message !
 
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Sadly there is no money behind my dibs. So all I can say is: enjoy your watch!
 
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Damn. That’s awesome. Even though I inherited 2 omega’s from my Family, they are nowhere as desirable (or awesome) as that. Still I keep them…I hope you enjoy doing the same. Simon Freese is a watchmaker who could give it a good service (and remove the bracelet without doing damage) if you are in the uk…
 
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The Brits have become more adventurous..... Dark green is an option now ... I had a few mil. Subs and found green nicer..... Personal taste....
Ah, didn't know. US guy. 😀
 
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Damn, an awesome family heirloom. It has been some time since a Military SM300 popped up. Enjoy your watch. And I think an auction house instead of private would be better if you wanna sell it.
 
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If it were me, I'd get it into a nice safe storage box and get it into a safety deposit box at the bank until deciding what to do with it. Every time you pick it up to look at it you run the risk of dropping it. The bezel might not be the best condition ever but if you manage to drop it and put a significant ding in the case or crack the crystal you start talking about losing real money if you do go to sell it. I don't know if i'd even risk taking the bracelet off. If you're going to sell it let that be the buyers problem to deal with.

Now, if you're already wildly wealthy then forget all of that, get it serviced, become a watch collector.
 
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If it were me, I'd get it into a nice safe storage box and get it into a safety deposit box at the bank until deciding what to do with it. Every time you pick it up to look at it you run the risk of dropping it. The bezel might not be the best condition ever but if you manage to drop it and put a significant ding in the case or crack the crystal you start talking about losing real money if you do go to sell it. I don't know if i'd even risk taking the bracelet off.

Can you even risk leaving the house? Who knows what could happen? I mean why get out of bed? You may trip and break your neck.

The watch was built for tough action and I am sure its seen it. It'll be okay.
 
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Ross, now everything has been said and advised. lots of advice on MWR as well. now it is your turn to decide. one more thing : Do NOT discuss this with family and friends. don`t show that off. too much envy around you. and the risk, somebody blabs and you become a burglar target. if you want to keep it, do not forget to organize the safe deposit box. if you want to sell it now, keep quiet about that with family and friends. then do not service it . contact Phillips very soon because you do not want to miss the delivery deadline for the december auction; your best chance in the year for maximum money. they organize the factory Excerpt from the archives and the fully insured shipment to them with a special value courier. you tell them, you expect them to charge you only 5% . another option : reqarding payment from the auction house, i`d request payment via a bank granted cheque. they will want to pay you in the auction country currency, which is not Pounds. banks make another killing with exchange currency tasks. you have 6 months to cash in this bank granted cheque and can watch the ever changing exchange rates hopefully turn in your favour.... kind regards. achim
 
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Can you even risk leaving the house? Who knows what could happen? I mean why get out of bed? You may trip and break your neck.

The watch was built for tough action and I am sure its seen it. It'll be okay.


For some people that watch is life changing money. Being careful with it so you don’t manage to take a big chunk of its value away seems like something to consider.