J serial Diver runs fast on wrist, is it normal?

[uri40]

Ok i will run the test, should I set it to correct/exact time (as much as possible) before running the test?

[eal15]

Yes. I test mine in multiple positions. Crown up, face down etc. if it's adjusted right in 5 positions then it should be close in each. I have seen some of my watches plus 7 and minus 8 type of a deal in different positions.


Thanks,
Everett
AP 15710 Diver
Sent from my iPhone

[fonglik]

Originally Posted by uri40

Ok i will run the test, should I set it to correct/exact time (as much as possible) before running the test?

i think that would be better, easier for you to record I assume.

[dpkong]

Been a while since I visited here.

More than a year ago, I had a very similar issue as this with my ROO. Perfect time when not worn but almost a minute gained every day when worn for a few hours daily.

Took it to the service centre and explained the problem. They ended up servicing the watch (was still under warranty) and since then it has run perfectly.

[fonglik]

Originally Posted by dpkong

Been a while since I visited here.

More than a year ago, I had a very similar issue as this with my ROO. Perfect time when not worn but almost a minute gained every day when worn for a few hours daily.

Took it to the service centre and explained the problem. They ended up servicing the watch (was still under warranty) and since then it has run perfectly.

Your was much more sever. Mine is running fast like 1 second for every 2 hours wearing.

Thanks for your sharing mate, I'll wait and see how it runs after weeks then to decide whether it needs to be regulated.

[uri40]

I did it crown down and in a period of 12hrs it gained 8+ seconds

[fonglik]

Originally Posted by uri40

I did it crown down and in a period of 12hrs it gained 8+ seconds

You mean 12hrs rest with crown down position without any wearing and it gained 8s?

If that's the case then I think you definitely need to take a trip to APSC for inspection and regulation. As far as I known cal.3120 tends to run fast when it's worn as a result yours will most likely gains more than 15 seconds or even 20 seconds over 24hrs with the combination of wearing and resting.

[uri40]

Thats correct I set the time as accurate as possible, I took it off and let ir rest crown down for 12HRs came back and its alt least 8 secs fast.

I'm going to call APSC I think the will send me box/kit to send it in.

[uri40]

Why would it run fast on the wrist? I tend to wear my watches for a week at a time and take them off to shower.

[singe89]

Originally Posted by uri40

Why would it run fast on the wrist? I tend to wear my watches for a week at a time and take them off to shower.

AP had an issue with using mainsprings that were too strong and it would cause what they called a rebanking issue. Off the wrist they are spot on but when you are active and the watch is at full power reserve and still being wound the movement would run fast. This was with the early 3120 movements and from what I could tell had been resolved with the later H series serials. My SS diver and 15400 would be spot on off the wrist but would gain 10-30 seconds a day depending on how active I was. The power reserve on both were around 70 hours. AP serviced both and they were almost spot on since. Ive purchased 6 other APs both H and I serial and none had this rebanking issue.

[fonglik]

Originally Posted by singe89

AP had an issue with using mainsprings that were too strong and it would cause what they called a rebanking issue. Off the wrist they are spot on but when you are active and the watch is at full power reserve and still being wound the movement would run fast. This was with the early 3120 movements and from what I could tell had been resolved with the later H series serials. My SS diver and 15400 would be spot on off the wrist but would gain 10-30 seconds a day depending on how active I was. The power reserve on both were around 70 hours. AP serviced both and they were almost spot on since. Ive purchased 6 other APs both H and I serial and none had this rebanking issue.

Mine is the latest J serial and just like you described, it runs spot on off the wrist and runs fast on wrist, but definitely not "30 seconds fast".

Do you think it's the rebanking issue? Many thanks!

[uri40]

Mine is an I series.