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105.012-65 service advice needed

jjbardell
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Hi all, new the forum but not new to the Omega world. 😀. I have recently acquired a 98% original 105.012 (only crown has been replaced) that has been sitting in a safe for 25 years now and the movement needs service. I took it to a 3rd party Omega service center so the original hands, pushers, etc. are not manipulated or replaced with service hands. I want to keep the watch looking original as possible which is becoming a challenge for us.
The watch is a MK1 case with a B2.MK2 dial with the fat pushers. I replaced the original band with a leather to preserve the OEM band.

My issues are:
  • Main spring needs replacement, no issues there.
  • Pulling the hands to service the movement will likely cause more cracking on the hands. I don't want newer replacement white hands.
  • The tritium is old and obviously needs delicate attention to mitigate any health risks to the servicer. I wanted him to coat the back of the hands to prevent any further degradation of the lum.
  • The pushers need servicing and new gaskets but the service pushers will be the newer thinner 145 style. They don't have the flat pushers anymore.
  • The crown was serviced about 25-30 years ago and is not OEM. We cannot find the A1 24 tooth crown.

How do I go about servicing this watch without losing it's rare 100% original condition/look?
Is there a source anyone knows for an A1-24T crown, OEM pushers, or OEM hands?

Thanks all for the input.

IMG_4568.webp
 
SOG53
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No way to avoid removing hands with needed movement service.
Is crystal cracked? Looks original with logo.
If you want water resistance then pushers need to be replaced I believe they can’t be effectively serviced with new gaskets.
I think it’s a choice. Leave it with original pushers and just wear it very carefully or replace pushers and likely crown and crystal to make water resistant. But look of watch will change w service pushers.
Btw you can find 24 tooth A1 crown but it won’t be water resistant if you go that way.
I have a wearable serviced Speedy and kept my 105.012-65 original but don’t wear it much.

Maybe others with more knowledge about replacing these parts will have other ideas.
 
tritto
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No reason you can't service the pushers - it's just a matter of dismantling and replacing the gaskets and (if necessary) the springs. Finding the right sized generic gaskets may be a matter of trial and error but I've done it myself on my 145.012. Lewis Watch Co in Australia offers this service alongside Speedmaster crown rebuilds.
 
jjbardell
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Thanks. Crystal is clean and clear and do not intent to replace it. I agree, keeping it original is key and I do not care about the water resistance as it will never be by water. Thanks for the input!
 
tritto
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Another option re the pushers is to ask your watchmaker to see if it is possible to fit the old pusher caps over newly fitted pusher tubes. It may be possible.
 
SOG53
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tritto tritto
No reason you can't service the pushers - it's just a matter of dismantling and replacing the gaskets and (if necessary) the springs. Finding the right sized generic gaskets may be a matter of trial and error but I've done it myself on my 145.012. Lewis Watch Co in Australia offers this service alongside Speedmaster crown rebuilds.
I am aware of people doing this but will the watch pass a pressure test? Or will it be just more water resistant ? Omega certified watchmakers I have talked with have not been willing to do this.
 
tritto
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SOG53 SOG53
I am aware of people doing this but will the watch pass a pressure test? Or will it be just more water resistant ? Omega certified watchmakers I have talked with have not been willing to do this.
SOG53 SOG53
I am aware of people doing this but will the watch pass a pressure test? Or will it be just more water resistant ? Omega certified watchmakers I have talked with have not been willing to do this.
Use the right gaskets and it can pass the pressure test - it's just a matter of working what size gaskets to choose. Given that Adam Lewis at Lewis Watch Co offers the service (along with crown rebuilds) my guess is that they can pass the test. For me, it was a matter of the old gaskets having melted so new gaskets helped to get the pushers operating smoothly again. If you're asking an Omega certified watchmaker to do it he may have to guarantee WR for two years.
 
photo500
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SOG53 SOG53
I am aware of people doing this but will the watch pass a pressure test? Or will it be just more water resistant ? Omega certified watchmakers I have talked with have not been willing to do this.
Yes after replacing the seals in the pushers, crown and case back the watch will pass the standard pressure test to 30M. Of course this is dependant on the case having no corrosion and the crystal being in good condition without crazing.
 
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