If it's not been serviced since new, that means it should get a full service (and that's likely why it's stopped), including replacing all the seals (pushers, crown, etc.) so if your local watchmaker has an Omega parts account, he should be able to do the job without any difficulty. If he doesn't, he may be searching for the required parts on the open market, which can be more costly. So it really depends - you will know that Omega is a safe bet at least.
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