precision

[danc222]

Just wondering about the precision of a Rolex and COSC. My Milgauss is consistently 2.2 seconds slow each day. I know this is within the guidlines - but if it is so consistent (never faster or slower than this), does that mean it can be adjusted to keep perfect time?

[DRAWTOOL]

Originally Posted by danc222

Just wondering about the precision of a Rolex and COSC. My Milgauss is consistently 2.2 seconds slow each day. I know this is within the guidlines - but if it is so consistent (never faster or slower than this), does that mean it can be adjusted to keep perfect time?

It's well within the COSC and consistant, personally I'd leave her alone.

[Idle Swede]

Yes, it can be regulated.

[padi56]

Originally Posted by danc222

Just wondering about the precision of a Rolex and COSC. My Milgauss is consistently 2.2 seconds slow each day. I know this is within the guidlines - but if it is so consistent (never faster or slower than this), does that mean it can be adjusted to keep perfect time?

Although I would prefer any mechanical watch to gain slightly, I would be jumping up and down and singing praises to such a accurate watch.The main thing for any mechanical watch is consistency I would leave it well alone.You watch is showing 99.998% accuracy which is fantastic for any mechanical watch.You could try resting your watch when off wrist flat dial up might gain a second or two over night.And when they regulate any watch on a machine to say zero beats,it don't necessarily mean it will perform the same on wrist.Afraid gravity and positions, is the mechanical movements worst enemy, thats why they are tested in five positions.

[danc222]

Thanks for the replies - i will leave it as it is. I realise how accurate it is running, but keeping 'perfect' time would also be nice.

[Jackxv]

Perfect is virtually impossible but it can be regulated slightly faster.

I also prefer a small gain.

In the old movements it's was written how much gain/loss it took after 1/4 turn of a screw.

Jack

[ed54]

Probably could be adjusted to be a little closer. The regulating process has a calibrated tool to allow adjustment in 1 sec increments (if I remember correctly). And I assume the watchmaker could do an incremental adjustment to accurately change the rate by 2 sec/day. I found the problem is more associate with finding a watchmaker that will go to the trouble of opening the watch for a minor tweak.
My watch was running 7 sec/day fast, so I called my independent, who said it was not enough to warrant opening the watch. When I had a dial to change out, he still wanted to do a service before he would agree to open the watch. Since the watch was 6 years old, I didn't have a problem with that.
The good news is that I now have my new dial installed, and he regulated the watch to about +1 sec/day. I think that's about as good as it gets!

[JBat]

Originally Posted by danc222

Thanks for the replies - i will leave it as it is. I realise how accurate it is running, but keeping 'perfect' time would also be nice.

I would do what Padi suggests and experiment with leaving the watch in different positions at night. It may or may not make a difference, but I recently discovered that my Sub gains a second or two at night if I leave it dial down. It ran a tad slow when I got it (~.8/day), but after six months it's running near spot-on.

[padi56]

Originally Posted by ed54

Probably could be adjusted to be a little closer. The regulating process has a calibrated tool to allow adjustment in 1 sec increments (if I remember correctly). And I assume the watchmaker could do an incremental adjustment to accurately change the rate by 2 sec/day. I found the problem is more associate with finding a watchmaker that will go to the trouble of opening the watch for a minor tweak.
My watch was running 7 sec/day fast, so I called my independent, who said it was not enough to warrant opening the watch. When I had a dial to change out, he still wanted to do a service before he would agree to open the watch. Since the watch was 6 years old, I didn't have a problem with that.
The good news is that I now have my new dial installed, and he regulated the watch to about +1 sec/day. I think that's about as good as it gets!

Look any watchmaker Rolex or high street can only test to say zero beats on the machine.But it dont mean that it will always perform the same on the wrist you guys worry to much over a few seconds.