Accuracy and winders

[SeaGoer]

First of all, Happy New Year to all!

I would like to share an observation with you and see if you have similar results.

My D sereial YM, bought new in October of 06, has been consistent to +5 secs per day. I wore the watch continously until October 2007 when I got a Z serial GMT IIc. The YM spent its nights with the crown up which helped a bit but still had to be adjusted a few minutes back at the end of the month.
After I got my GNT, The YM spent a lot of time on a winder, set at 650 cycles, except for an occasional weekend wear.

Now the YM is 42 secs fast for the whole month of December!!!!

The only difference I can think of is that the watch is now kept fully wound at all times, which, if my thinking is corrrect, does wonders to its accuracy.

Do you find similar results?

[Tools]

It is well know that a mechanical watch performs differently in different positions. Much the reeason why during a certification test it is tested in 5 different positions.

On a winder a watch will be rotated in only one plane....on your wrist it will experience many different orientations; therefore it will likely be different..

If your watch was consistently +5 and you alwalys placed it crown up to slow it down at night, I might have had it regulated to your body rythem long ago..

[SeaGoer]

I had thought of having it regulated but ended up opting out of it since the +5s secs/day did not really bother me and still fell within COSC.
Incidentally, the GMT has almost been spot on from the getco.

[Tools]

Originally Posted by SeaGoer

IIncidentally, the GMT has almost been spot on from the getco.

[drnosker]

In addition to possible differences in rate of position, there can also be a small difference due to the difference in temperature from your body temperature to room temperature. Based on my experience, any properly cleaned and oiled Rolex chronometer can be adjusted to within a couple of seconds a day unless there's an issue mechanically.

[SPACE-DWELLER]

I don't own a winder, but I notice that when my watch is fully wound, precision is much better than when the PR's low.

[mike]

Originally Posted by SPACE-DWELLER

I don't own a winder, but I notice that when my watch is fully wound, precision is much better than when the PR's low.

Yep. My experience has been a fully wound has much better consistency.

[f16570]

I can confirm that when fully wound improves accuracy.
My wife's DJ is only worn at the weekend and I fully wind it before she wears it and it is always spot on with my watch at the end of the weekend.

f

[marshallr47]

Do what winders keep watches fully wound or just enough to keep watches ticking? When you take a watch off of a winder, do you still have to wind it fully?

[Givmeabrek]

A watch winder is designed to simulate the wearing of a watch. It keeps the watch fully wound just like wearing it does.

I have two watches (older DJ and new EXP II) that I alternate on a winder (actually two different ones). The result is the same. On the winder they both lose a second or two and on my wrist they gain a second or two each day. The end result is they keep almost perfect time.

The only difference between the winder and the wrist is basically the orientation. The winder keeps the watch vertical with the 12 o'clock side up and of course the wrist is other orientations. Actually 12 o'clock is mostly down on the left wrist. It seems to all even out.

Rich

[SeaGoer]

Originally Posted by marshallr47

Do what winders keep watches fully wound or just enough to keep watches ticking? When you take a watch off of a winder, do you still have to wind it fully?

Before you put the watch on the winder you are supposed to manually fully wind it, then the winder keeps it fully wound.