Rolex datejust (3135) accurate adjustment

[Gabik]

Hi guys,

1. To gain a few seconds, lay the watch flat face-up overnight.
2. To lose a few seconds, lay the watch vertically with the crown downwards overnight.
3. To lose a few more seconds, lay the watch vertically with the crown up.
I will try it tonight.

This sheme doesn't work for my Datejust (2005).
Could you please tell me in which position the watch loses seconds and in which it gains them.

Thank you in advance.

[Andad]

Welcome to the Forum.

The later Rolex 3135 movements do not always show much positional variation.
Fortunately this gives you good precision and that can be transformed to great accuracy.
If you feel you need better accuracy take it to a RSC.
That may be difficult in Lithuania.
My nearest RSC is 800km away.

[Gabik]

Originally Posted by directioneng

Welcome to the Forum.

The later Rolex 3135 movements do not always show much positional variation.
Fortunately this gives you good precision and that can be transformed to great accuracy.
If you feel you need better accuracy take it to a RSC.
That may be difficult in Lithuania.
My nearest RSC is 800km away.

Thanks a lot for the quick reply. My watch gains 5 seconds per day, and I've noticed that there is a slight dependence on the position. Maybe there are people here who noticed that too and actually found the perfect position.

[padi56]

Originally Posted by Gabik

Thanks a lot for the quick reply. My watch gains 5 seconds per day, and I've noticed that there is a slight dependence on the position. Maybe there are people here who noticed that too and actually found the perfect position.

No mechanical watch will give 100% perfect time there will be always tiny daily deviations.Myself would not even think about getting the back off if any watch is running to the COSC spec.Now the COSC spec is a AVERAGE of between -4 to + 6 seconds over any 24 hour period your watch is showing 99.995% accuracy.The most important thing with any mechanical watch is consistency have you tried giving it a full manual wind 40 full crown turns clockwise.

[Boadicea]

I don't think position plays a part in modern movements, I do notice that temperature does!

Daytona on winder in cold safe: -3 seconds
Daytona on warm wrist: +1 second

DateJust on winder in cold safe: +2 seconds
DateJust on warm wrist: +4 seconds

Explorer doesnt seemt to care, always +half a second per day.

[Gabik]

Thanks a lot for the replies, but I've personally noticed that when I put the watch vertically with the "12" upwards, it gains less seconds than in any other position. Maybe someone else found a position where the watch goes slower, or is it individual for every watch?