Accuracy

[Dobbert]

My day date bought brand new from a large AD runs 3:8 seconds fast. I sent it away for repair to Rolex via the AD and it came back 3:8 seconds fast. Should I try again or accept this time deviancy isn’t too bad?

[AkshayArgade]

my sub is 3 seconds slow per day consistently.

datejust is 2 seconds fast per day consistently

another datejust is 1-2 seconds fast per day consistently

I've learnt to live with it-- if it aint broke don't fix it.

unless either of these watches stops working / starts acting up etc, I won't service them.

my advice would be to live with it.. its a mechanical piece ,, enjoy it.

[saxo3]

Originally Posted by Dobbert

My day date bought brand new from a large AD runs 3:8 seconds fast. I sent it away for repair to Rolex via the AD and it came back 3:8 seconds fast. Should I try again or accept this time deviancy isn’t too bad?

Welcome To The Pleasure Dome ;-)
I would not send it in again for regulation.
Accuracy depends on many parameters.
Try different rest positions (dial up, dial down, 3 up, 6 up, 9 up) overnight and determine its influence on timekeeping.
One can also check rates with a timegrapher.
Start with full winding of the movement.

[watchmavan]

Originally Posted by Dobbert

My day date bought brand new from a large AD runs 3:8 seconds fast. I sent it away for repair to Rolex via the AD and it came back 3:8 seconds fast. Should I try again or accept this time deviancy isn’t too bad?

Superlative Chronometer on a newer Rolex means +\-2 seconds. This is tested in 5 positions though and real time testing while accurate for you may/probably not be accurate. I just back my 1999 Polar 16570. I haven't put it on the Timegrapher yet but real time testing last week has it at -0.3.

[lennywilkins]

Originally Posted by Dobbert

My day date bought brand new from a large AD runs 3:8 seconds fast. I sent it away for repair to Rolex via the AD and it came back 3:8 seconds fast. Should I try again or accept this time deviancy isn’t too bad?

Sounds like they did nothing with the watch.

Insist on the watch being regulated to within -2/+2.

[watchmaker]

Originally Posted by lennywilkins

Sounds like they did nothing with the watch.

Insist on the watch being regulated to within -2/+2.

Not necessarily. A watch can average +-2sd and still produce a real world gain of 3.8sd.

I would try leaving the watch overnight in the opposite position from what the OP is currently doing.

ie If he rests it crown up overnight, try crown down.

[lennywilkins]

Originally Posted by watchmaker

Not necessarily. A watch can average +-2sd and still produce a real world gain of 3.8sd.

I would try leaving the watch overnight in the opposite position from what the OP is currently doing.

ie If he rests it crown up overnight, try crown down.

I don't disagree, however IMO it is too coincidental that it's running precisely the same as it was before.

[watchmaker]

Originally Posted by lennywilkins

I don't disagree, however IMO it is too coincidental that it's running precisely the same as it was before.

I don't think we've heard enough from the OP to conclude anything from what they have said.

How have the measured the timekeeping? In how many positions? For how long?

It's very possible Rolex did do nothing to the watch because there is nothing wrong with it

[padi56]

Originally Posted by lennywilkins

Sounds like they did nothing with the watch.

Insist on the watch being regulated to within -2/+2.

They could regulate on a machine to -2+2 seconds but on the wrist could be slightly different as there are many many variables.Remember this the escapement of a mechanical watch in 24 hours pushes the gears 432,000 times and a day has 86,400 seconds, so even 3.8 seconds is not life threatening.Now on the wrist the movement is constantly affected by the earth's gravity,mainspring power-reserve, metal expansion and contraction, temperature variations, subtle changes in lubrication and friction, shocks, and so on.The fact is that no mechanical watch made will keep 100% perfect time, very close yes but perfect no.

[amanbra]

I'd happily accept 4s per day. In fact one of my daytonas is closer to 5 per day and there is no way I'd have it opened up because of that.

[saxo3]

OP disappeared after his first post?