GMT 1675 still at +8sec after service

[MrChamfers]

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?

How did you check the timing before service to get that +1 second result?

It should be from an average of many measurements with the watch in different positions, at a full wind.
If the average timing got worse after servicing that would be kind of strange.

[Dan S]

No offense, but if you are so obsessed about a few seconds a day, a quartz watch might suit you better.

[saxo3]

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?

The Rolex after-sales rate tolerance for your watch movement is -1/+10 sec/day, measured with a timegrapher. It is NOT the accuracy or obtained timekeeping on your wrist.

You need a timegrapher, measure (after full winding) the caliber rates in 5 different positions (DU, 3U, 6U, 9U, DD), and determine the average value X.

[StanGMT]

The 1675 GMT has the micro-stella adjustment system. Following servicing my watch would usually take a few weeks to bed down and then, if I wasn't happy with the timekeeping, my AD would take it into their workshop and regulate it. I think this happened twice in the 50+ years I used it as my daily wearer. The important factor is consistency - if a movement is gaining one day then losing the next day, then something is wrong and it needs servicing. But if it is, say, gaining 8sec/day consistently then it is good, it doesn't need further servicing, just regulating.

Stan.

[timnik]

I have a 1969 GMT. It runs slow. Always has.

It doesn't bother me.

I use my phone for accurate time.

Like everybody else.

[PVR]

If it's still slow or fast after service it may be magnetized. Try to unmagnetized it and take a new reading or re time the Stella adjustment after doing do..