There are a some brands that will service every watch they've ever made, fabricating new parts as needed. Few of us can afford one of those.
I asked them how this works, and they said anything younger than 80 years Omega just sends them parts without any issue, anything older they have to send back to Switzerland for service, and yes, then Omega might have to manufacture the parts required on the spot - and yes, that then turns really expensive.
I was lucky enough to inherit my grandfather's pre-COMEX 5513 in very good condition - one or two tiny specks on the dial and a light scratch on the case. The appraiser gave me the warning that I should never send it to a Rolex repair center for servicing under any circumstance. If I did, I'd likely end up having the original acrylic bubble being replaced with crystal, the case polished high heaven, new tritium applied, and it'd probably be worth $15k less.
Collectors want a watch that shows signs of life; they value a nice patina. Many watch manufacturers service things to "modern spec" and try to make a watch look new. For a watch that old, I'd strongly suggest you find an independent watchmaker or two and get them to give you an estimate before you do anything.
Yeah, but I don't. I don't have this watch as an investment - hopefully I'll use it for another 50 years and then someone else can use it again for 50 more years. In fact in addition to the service I paid £300 to have the dial replaced with a brand "new"(old stock) identical dial, because mine was showing very minor signs of corrosion. If a collector somewhere has an issue with that.....tough? Also I have no idea how anyone could ever even tell the dial was replaced, the new one is original Omega, just......flawless.
>> If I did, I'd likely end up having the original acrylic bubble being replaced with crystal, the case polished high heaven, new tritium applied, and it'd probably be worth $15k less.
That sounds perfect, if it were my watch I'd absolutely do that. Who cares how much it's worth at the end? If it's your grandfather's watch, then you probably won't ever sell it, will you?
Either way, I understand this is a personal choice.
>>for a watch that old, I'd strongly suggest you find an independent watchmaker or two and get them to give you an estimate before you do anything.
I did, both of them went "oh it's an omega, it's going to be about £400 for a full service mate" - so servicing it with Omega wasn't that much more expensive and it was a much better shout in my book, I know that whatever parts they replaced are original and brand new.
edit: just to add to the above - sorry, I realized I came across as very defensive. Yes of course your advice applies 100% if someone cares about maintaining the value of a vintage watch. Identical advice applies to maintaining vintage cars as well. But if you buy a vintage watch like me, to use it as....a watch....then just keep that in mind too.
The two things I wanted to flag were
1) watches can have surprising value fluctuations, so they're worth being appraised professionally: just because you have "a model X from company Y dating back to Z" doesn't mean you'll get the valuation right if you try. If Papa were a desk diver at COMEX instead of Arthur Andersen I'd have likely ended up with a 5514 instead, and my six figure watch would be in a safe somewhere, not on my wrist.
2) many companies, when repairing, will not hesitate to add modern components. Rolex is apparently notorious for this, but others do it as well. In the opinion of Rolex, a watch is a watch: your GMT-Master with a Bakelite bezel is no different from a GMT-Master from 2022, it's just out of spec and needs a refresh.
The combination of this has lead to horror stories where people send their watch in for what they expect to be a fairly routine service (cleaning, oiling, etc.) and end up with an entirely different watch.
As others have noted, if you own a well-known brand like a Seiko you can easily purchase an entirely new movement for $50-$75 and this should take a watchmaker no more than one hour of labor or you can DIY. (Many non-Seiko brands use NH35/36 movements, which are made by Seiko)
Still, though - keep in mind that entire Seiko movement can be bought for like $50-75. And many of their most common movements are interchangeable. For example, an older 7S26 can be replaced with a new NH36 that sells for about $50. https://chronometercheck.com/seiko-7s26-movement/
It's not entirely unfeasible to imagine buying a spare movement or three if you were, say, planning on doing sort of a heirloom thing and wanted to ensure a supply of parts N decades into the future.
That said, a lot of in-house movements are little more than tweaks and high end finishing applied to existing commodity movements.
NH35 can be serviced, but makes more sense an assembled replacement part. The same argument can probably made for the entire watch. The appeal of using one watch for 30 years is more in romantic fantasy than practicality.
It usually is this one in almost all their models:
https://www.amazon.co.uk/dp/B0080GQBTU/ref=cm_sw_r_awdo_XX5J...
The only thing you need to be mindful of with Eco-Drives is that you can't let it lose all charge. It can keep functioning in complete darkness for around 6 months, according to the specs, but if you do this enough times the battery will lose the ability to hold charge and will need to be replaced, and there are plenty of reports to this effect. If you're not planning on wearing it, just leave it somewhere that it can get natural light, instead of a drawer, and you should be good.
While mechanical watches are undoubtedly cool and elegant, they're not perfect timekeepers, and when they do need maintenance it's not something trivial which you can perform yourself. For my day-to-day watch I'll take an accurate quartz movement with virtually zero maintenance any day. In other words an Eco-Drive, or something similar.
I do not know whether this also applies to Eco-Drive.
Take it to a watchmaker, a fix like this would be pretty straightforward.
That said, simply adjusting the tick rate to regulate timekeeping is very easy and if you've got steady hands and a sharp eye then you can do it yourself with a wooden toothpick, assuming you've got a tool to remove the watch back. Any shop (offering repair facilities) could do it as well in a matter of minutes.
If a part does fail, it's usually the old blue steel mainsprings.
They can be replaced with modern White-Alloy springs. (That is just a brand name.)
Watches are my thing. I don't know why I like them so much, but do.
Servicing does take awhile to learn though. That whole 10,000 hrs probally. Servicing a watch does not take that long to learn. I'm talking about making parts with a Jeweler's lathe. And getting to the point where you know those parts well enough to visualize exactly what's wrong with a timepiece by looking at it.
If you did learn to clean/oil your mechanical watch, it's something that will be passed down to loved ones.
Oh yea, Service a mechanical watch when it stops keeping good time. That is unless you take it in the water.
I know a watchmaker who told his father he needed to Service his gifted wristwatch. His father got it 30 years ago as a present, and just wore it daily. The watchmaker was expecting dried up oil, but to his astonishment, the oil was still there. It was hermetically sealed. Oils do breakdown, but he couldn't find any damage to parts using a 40x stereoscope.