Face up, crown down... doesn't work...

[Boadicea]

I have been trying to regulate my watches by using the face up/crown down evening position method and I have to say that it doesn't work. My explorer is running at a constant -1 per day (I sleep with it on) but leaving it face up on the table over night loses even more and it will be less an extra second or so my morning. My DJ is currently +2 and I have been trying it crown up and there is no change at all. I know crown down is the best for this but I figured that at lease one second or so would have been shaved off after time or perhaps only gain +1 for the day.

Anyway, I guess the good news is that these could probably be regulated to +0.5 or so given the consistency, does anyone else have watches that don't seem to care how they are left overnight?

[padi56]

Originally Posted by Boadicea

I have been trying to regulate my watches by using the face up/crown down evening position method and I have to say that it doesn't work. My explorer is running at a constant -1 per day (I sleep with it on) but leaving it face up on the table over night loses even more and it will be less an extra second or so my morning. My DJ is currently +2 and I have been trying it crown up and there is no change at all. I know crown down is the best for this but I figured that at lease one second or so would have been shaved off after time or perhaps only gain +1 for the day.

Anyway, I guess the good news is that these could probably be regulated to +0.5 or so given the consistency, does anyone else have watches that don't seem to care how they are left overnight?

Many of the more modern movements based on the Cal 3135 with or without added complications,don't self regulate in certain positions like the older 15XX series movements.But your results are excellent in both watches,fact no mechanical movement will give 100% spot accuracy.Sure there will be a few that will self regulate.Gravity affects mechanical watches the most thats why they are tested in 5 different positions.And in those different positions there will be
slight deviations in the timekeeping.Remember this the escapement of a mechanical watch in 24 hours pushes the gears 432,000 times. Since a day has 86,400 seconds, even a watch that runs five minutes fast or slow each day has an accuracy of over 99.6 percent! A finer mechanical watch that gains or loses about six to nine seconds a day or about a minute a week has a breathtaking precision of over 99.99 per cent. This is very high precision, given the fact that the movement is constantly affected by the earth's gravity, 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 perfect time, very close yes but perfect no

[Boadicea]

That makes sense. I am happy with the accuracy and do not intend to get it changed. I was just wondering about the positions and you have cleared that up nicely.

PS: I get the feeling that the off wrist temperature is affecting my exp more than the position.

[alfanator]

+/-2sec is pretty darn good for a Rolex.