GMT 1675 still at +8sec after service

[billydgates]

Hi, had my 1675 serviced in a local watch maker, after it was serviced it still reads +8sec, as i understand it should be around +-2sec, the watch maker says its just due to age thats why the reading. Question is this really the case or the watch maker does not know how to service the watch?

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[Hkspwrsche]

-4+6 is the cosc range. -2+2 is for the newest Rolexes. That doesn’t apply to vintage that I’ve heard. He should be able to get it down to cosc spec unless it needs other parts?

[Tom1675]

Up to you but that seems a quick and is not within COSC. Also, the explanation is not acceptable.

You can try to put the crown down as it rests when its off your wrist, that will slow it a bit.

[springer]

40-year-old watches are not certified chronometers, they are COSC when new and sometime afterward. Parts, jewels etc become worn after time and short of replacing everything, I wouldn't expect anything very old to be within COSC specs. If it is keeping time within COSC specs now, that's an added bonus.

[Dan S]

+8s in what position? Try measuring it dial-up, dial-down, crown-up, and crown-down, and then compare the differences. That might help you understand why it can be non-trivial to regulate an old watch.

[Tom1675]

Originally Posted by springer

40-year-old watches are not certified chronometers, they are COSC when new and sometime afterward. Parts, jewels etc become worn after time and short of replacing everything, I wouldn't expect anything very old to be within COSC specs. If it is keeping time within COSC specs now, that's an added bonus.

Thanks for this, and it makes sense. I have always been under the impression that COSC is something a properly serviced piece should be running at, probably bc so many pieces for sale simply say "running @ COSC specs" whether serviced or not...

[Ashton_Horologist]

The short answer is no, it should be running better than that. When I was at RSC Toronto we aimed to get all watches running at a steady gain of +2 seconds per day. We would let them go is they were up to 3-4 for vintage pieces, but the aim was still there. 8 seconds is too much for a 15xx series movement and that can be made much better.

Was the person who serviced the watch familiar with vintage Rolex calibers? Was it a cheap an cheerful type service, or something a little more serious? These factors all come into play...

[KarlFr]

Weird thing is I had this problem a while back to with a similar watch and it settled down to a more relaxed pace in a few weeks of using

On the other hand I have a vintage sub 1970 now that is spot on accuracy +-1 sec and it hadn't had a service noted in the caseback for 3 decades Have to go to the spa now anyways since crown isn't gripping when winding

Maybe that one will get overexcited too afterwards

Vintage Rolex have personality I guess

[OysterBracelet]

Time tolerance for that calibre is -1/+10.

[onthedial]

@KarlFr
Remember the old Simple Regulating instruction card:
*To lose a few seconds, lay the watch vertically with the crown downwards overnight.
*To lose a few more seconds, lay the watch vertically with the crown up.
______________
Instagram: @onthedial

[KarlFr]

Originally Posted by onthedial

@KarlFr
Remember the old Simple Regulating instruction card:
*To lose a few seconds, lay the watch vertically with the crown downwards overnight.
*To lose a few more seconds, lay the watch vertically with the crown up.
______________
Instagram: @onthedial

Not to hijack the thread but funny thing is that I often sleep w/ my watch currently in rotation so considering that it´s probably a question of sleep pattern?
When then sleeping on my belly I loose seconds

[Hub6152]

Originally Posted by KarlFr

On the other hand I have a vintage sub 1970 now that is spot on accuracy +-1 sec and it hadn't had a service noted in the caseback for 3 decades Have to go to the spa now anyways since crown isn't gripping when winding

Maybe that one will get overexcited too afterwards

Vintage Rolex have personality I guess

My ‘70 1675 is remarkably my most accurate watch at +-0, and as yours I don’t know it’s service history. My 1016 was serviced by RSC in 2012 and is +10 per day. My freshly non RSC serviced 1603 is also around +10.

Personality definitely!!

These are all much more time consuming and difficult to accurately regulate because of their constant length free-sprung balance wheels and use of screw weights on the balance wheel rim rather than a simple regulateur type pointer/adjuster like an ETA2824 has.

[billydgates]

Originally Posted by Ashton_Horologist

The short answer is no, it should be running better than that. When I was at RSC Toronto we aimed to get all watches running at a steady gain of +2 seconds per day. We would let them go is they were up to 3-4 for vintage pieces, but the aim was still there. 8 seconds is too much for a 15xx series movement and that can be made much better.

Was the person who serviced the watch familiar with vintage Rolex calibers? Was it a cheap an cheerful type service, or something a little more serious? These factors all come into play...

Not sure if they are familiar with vintage Rolex,i know they used to work at RSC. I just told them to service the watch so i know its newly oiled changed some rubber change crown and tube, they said before service that it was running fast thats why they recommended service but when they returned it it was still the same, if i go back to them whats the perfect question to ask so i can analyze and see if they know what they are doing or not.

[rumjungl]

Originally Posted by billydgates

Not sure if they are familiar with vintage Rolex,i know they used to work at RSC. I just told them to service the watch so i know its newly oiled changed some rubber change crown and tube, they said before service that it was running fast thats why they recommended service but when they returned it it was still the same, if i go back to them whats the perfect question to ask so i can analyze and see if they know what they are doing or not.

Billy, please have them put your watch on a timer and give you the readings for all 6 positions. Most likely the balance is not moving in a full rotation which will lead to the watch running fast. As Springer mentioned there may be wear to internal parts that are preventing the balance from a full rotation. It may also be from over-oiling the balance jewels and gear pivots. Maybe wear the watch for a couple weeks and see if this persists. Your watch has one of the best movements ever made and should be able to achieve COSC if the internals are in order.

[jdmi32]

If it’s consistently +8, then I’d be just fine with it.

[Boaters]

Less than one minute a week I could live with that!

[Bort]

I just had a 16803 serviced, and it's also running +8 per day.
I'm going to leave it alone.
Interestingly, I also recently had a 16800 serviced at the same time, and it's running +2 sec. per day.
They are both 1985 year watches, and the 16800 has been worn daily since new, and gotten 10x the wear of the 16803.

[kzm40]

I'd be happy with that, would you expect car the same age to perform exactly as new, or would you treat it with more mechanical sympathy?

[16800forLife]

Originally Posted by Bort

I just had a 16803 serviced, and it's also running +8 per day.
I'm going to leave it alone.
Interestingly, I also recently had a 16800 serviced at the same time, and it's running +2 sec. per day.
They are both 1985 year watches, and the 16800 has been worn daily since new, and gotten 10x the wear of the 16803.

Pics of your 16800 please

[swish77]

Wear it for a couple of months. It might settle down some. If it's still +8 secs after that, I'd either have my watchmaker re-regulate it if it really bugged me, or just live with it. It's pretty darn good for an old watch.

[mineral]

I won’t bother with this and FYI, my mark 2 matte dial 1675 also gains +10s after regular service and I think yours is fine too


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[joli160]

It's a classic, would not bother me one bit.
(Personally I'd never go to any local watchmaker though)

[billydgates]

Thanks all will leave it alone for the moment and have it rechecked after a few months

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[RRGHOST1]

Wouldn't bother me one bit !

[padi56]

Originally Posted by billydgates

Hi, had my 1675 serviced in a local watch maker, after it was serviced it still reads +8sec, as i understand it should be around +-2sec, the watch maker says its just due to age thats why the reading. Question is this really the case or the watch maker does not know how to service the watch?

Sent from my SM-N950F using Tapatalk

That would depend on your testing methods all tests are normally conducted with watches that have full power-reserve in mainspring on a full manual wind.So if say tested on a machine to say +3 seconds this dont always mean it will perform exactly the same on the wrist.All the bare uncased Rolex movements are still tested at the COSC to a AVERAGE of -4+6 daily rate to get the COSC certification.Plus in the first 10 days of COSC testing the movement could vary by up to 10 seconds on any single day and still pass the COSC test.Even if they did re-regulated to say +4 seconds I am sure those 4 seconds out of 86400 in a day will have no effect on your daily life leave it could improve with more wearing. Try resting vertical crown up when off wrist could lose a few seconds overnight.

[77T]

Even the Winder Queens & Kings perform differently than in the wild.

If I were not looking, I’d say most any Rolex needs to only be reset by the owner once or twice a month and you’d still be on time for the train, plane or appointments.


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[billydgates]

Originally Posted by padi56

That would depend on your testing methods all tests are normally conducted with watches that have full power-reserve in mainspring on a full manual wind.So if say tested on a machine to say +3 seconds this dont always mean it will perform exactly the same on the wrist.All the bare uncased Rolex movements are still tested at the COSC to a AVERAGE of -4+6 daily rate to get the COSC certification.Plus in the first 10 days of COSC testing the movement could vary by up to 10 seconds on any single day and still pass the COSC test.Even if they did re-regulated to say +4 seconds I am sure those 4 seconds out of 86400 in a day will have no effect on your daily life leave it could improve with more wearing. Try resting vertical crown up when off wrist could lose a few seconds overnight.

i will try resting the crown up when off wrist for the next few days and see what happens. thanks

[CFR]

Originally Posted by billydgates

Hi, had my 1675 serviced in a local watch maker, after it was serviced it still reads +8sec, as i understand it should be around +-2sec, the watch maker says its just due to age thats why the reading. Question is this really the case or the watch maker does not know how to service the watch?

Just for kicks, try demagnetizing it. It takes literally 2 seconds, your watchmaker should do this for free, it can't hurt, and it's totally non-invasive. +8/day would be a bit too fast for me. +5/day I'd take.

[smokd]

Reviving the thread here. I just got back from my 3rd visit since servicing my 1675 GMT at the RSC in NYC. I’ve had to keep going back because my watch keeps running fast (11-12 seconds per day). The last two times, they kept it and overhauled it again. It still didn’t make a difference. I brought it in today and it was running 11.7 seconds fast. I asked them to regulate it and was told the best they could get it to was +6 seconds. I asked them why that was the case and they said because it’s old. I’m wondering if this is true or if it’s just a matter of the watchmaker not wanting to spend the time to make it run better. I know +6 seconds is within COSC standards but I’m annoyed because it was running at +1 second before servicing. One would think I would get it back the same way. What’s everyone’s take on this?

[Swoop]

Originally Posted by smokd

Reviving the thread here. I just got back from my 3rd visit since servicing my 1675 GMT at the RSC in NYC. I’ve had to keep going back because my watch keeps running fast (11-12 seconds per day). The last two times, they kept it and overhauled it again. It still didn’t make a difference. I brought it in today and it was running 11.7 seconds fast. I asked them to regulate it and was told the best they could get it to was +6 seconds. I asked them why that was the case and they said because it’s old. I’m wondering if this is true or if it’s just a matter of the watchmaker not wanting to spend the time to make it run better. I know +6 seconds is within COSC standards but I’m annoyed because it was running at +1 second before servicing. One would think I would get it back the same way. What’s everyone’s take on this?

man id give up and just enjoy wearing it