Omega gains 20 minutes per day

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I have an early 1960’s Omega Constellation automatic chronometer. It gains 20 minutes per day. What’s wrong with it?
 
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A watch maker can demagnetize it for you. Simple process
 
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A watch maker can demagnetize it for you. Simple process
I bought it New in 1963. Have not wore it much. I don’t think I‘ve ever serviced it
 
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I bought it New in 1963. Have not wore it much. I don’t think I‘ve ever serviced it

It's past due for servicing.
 
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You should have it serviced. I isn't getting any lubrication from the old dried up oil.
 
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I bought it New in 1963. Have not wore it much. I don’t think I‘ve ever serviced it
Definitely take it in for a servicing. It’s long overdue. Mention that it runs that fast and your watch maker will get it resolved. Definitely take it to a trustworthy one. Simple things can cause magnetism (if that’s the culprit). Everything with a speaker has a magnet in them- phones, headphones, computers, and so on. But it sounds like a lot more is at play than that.
 
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Definitely take it in for a servicing. It’s long overdue. Mention that it runs that fast and your watch maker will get it resolved. Definitely take it to a trustworthy one. Simple things can cause magnetism (if that’s the culprit). Everything with a speaker has a magnet in them- phones, headphones, computers, and so on.

Indeed true and iPhones and iPads have especially strong magnets!
 
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I have an early 1960’s Omega Constellation automatic chronometer. It gains 20 minutes per day. What’s wrong with it?

I bought it New in 1963. Have not wore it much. I don’t think I‘ve ever serviced it

Yeah, this is a legit thread. 🙄
 
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Oily hairspring. Several coils stuck together. Take it to an actual experienced watch guy who specializes in antique watches. Don’t take it to the local big box store watch repair counter. He would be much more likely to advise you than we would. Be prepared to pay to have it serviced.
 
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Thanks to all of you. Have you heard of a guy named Lesley Wambble who services Omegas in Atlanta, GA?
Oily hairspring. Several coils stuck together. Take it to an actual experienced watch guy who specializes in antique watches. Don’t take it to the local big box store watch repair counter. He would be much more likely to advise you than we would. Be prepared to pay to have it serviced.
 
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Thanks to all of you. Have you heard of a guy named Lesley Wambble who services Omegas in Atlanta, GA?
@SohAIS is in Atlanta. You could try asking him.
 
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I got my demag off ebay for a few bucks. Worked really good on my watches