Crown down

[Steven Andrew]

I often read on here of people laying down their Rolex at night etc Crown down. Why is this ?

[Frakis]

I've heard that depending on crown up or down supposedly decreases or increases seconds. I'm sure somebody will correct me if I'm wrong.

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[teb1013]

Originally Posted by Steven Andrew

I often read on here of people laying down their Rolex at night etc Crown down. Why is this ?

These are the tips provided by Rolex.



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[Steven Andrew]

Thank you. More watch knowledge stored away.

[Andad]

You can read the time easier during the night?

[Andad]

Originally Posted by teb1013

These are the tips provided by Rolex.



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That might have worked in 1946.

If modern Rolex watches had those positional variances we would be up to our armpits in complaint threads.

I have just worked out where Pete got the the 86400s/d from.

[Old Expat Beast]

Originally Posted by teb1013

These are the tips provided by Rolex.



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This is old info from Rolex, and it works best on their older movements. Some people have reported results with newer movements, too, though. My Tudor/ETA movements respond really well to overnight positioning, which is why I like them.

[Andad]

Ok, ok, what Adam said.

[Ledesc]

It has an impact on my 1 month old BLNR.
Crown up helps to lose the +1s I gain during the day to stay at 0s per day.
At night, crown up or 12 up are the only positions to lose about 1s, crown down or dial up will gain 1s.

So I can say my watch is rather close to the upper +2s limit given by Rolex on the modern movements.

[GUB]

Okay, more than you asked for here.

All mechanical watches will have slightly different rates in all 6 positions. The ability to adjust a watch to 6 positions is one of those tasks that separates the watchmakers from the hobbyists. It is very, very hard to get within +/- 2 seconds in all 6 positions, but not impossible.

In the vertical positions, like "crown down" and "crown up," the difference is due to the "pinning position at the collet" (how and where the hairspring is attached to the balance wheel, in effect). This affects how the hairspring spring "unfolds" from its point of attachment.

A Rolex will have small differences between positions because it has a free-sprung balance, high-quality hairsprings and jewels, and great watchmakers adjusting it before it goes out.

[bradyb]

I have 2 newer GMTs - both with brushed center links, heh, heh - and unfortunately both gain about 10 secs/day (~1min per week).

Face-up and crown-up doesn't seem to have any effect, but letting them sleep face-down and crown-down brings this gain down to about +2 seconds per day.

Not too happy about this but also not too excited about sending them off to be regulated - and they (might) come back into line over time, which I've seen with other watches.

[brandxbrand]

Originally Posted by bradyb

I have 2 newer GMTs - both with brushed center links, heh, heh - and unfortunately both gain about 10 secs/day (~1min per week).

Face-up and crown-up doesn't seem to have any effect, but letting them sleep face-down and crown-down brings this gain down to about +2 seconds per day.

Not too happy about this but also not too excited about sending them off to be regulated - and they (might) come back into line over time, which I've seen with other watches.

Movements running fast are a classic sign of magnetization. Run it through a demagnetizer. Might have built up some charge since you got it.

Happens to me quite often so I ended up just buying a basic one from ebay. Works a charm, even if I do only use it once every few months.

[bradyb]

Originally Posted by brandxbrand

Movements running fast are a classic sign of magnetization. Run it through a demagnetizer. Might have built up some charge since you got it.

Happens to me quite often so I ended up just buying a basic one from ebay. Works a charm, even if I do only use it once every few months.

Cool - thanks for the advice. For some reason I was thinking the GMT was amagnetic, but maybe that’s just the Milgauss.

Regardles, I just ran both through The Beast and will see how they do. I love this old thing:

[brandxbrand]

Jesus! Are you sure that thing is an ANTI magnetizer?!

Failed to mentuon before but it's helpful if you also have regulator to see if any progress is made after running it though. Sometimes it takes me 2 or 3 times to have any effect. Plenty to be found on the app store which work well for free or very cheap.

Hope you are successful in getting your two GMTs back into standards!

[padi56]

Originally Posted by brandxbrand

Movements running fast are a classic sign of magnetization. Run it through a demagnetizer. Might have built up some charge since you got it.

Happens to me quite often so I ended up just buying a basic one from ebay. Works a charm, even if I do only use it once every few months.

I would doubt if his watch is magnetised in general its the hairspring thats the main culprit causing it to stick together.And seeing Rolex uses a parachrom hairspring which they claim is fully resistant on getting magnetised.And in general the movement will speed up and not by a few seconds, and run very erratic and even stop and refuse to start.And OP stated depending on resting position he can get it to about +2 seconds per day,so his watch is NOT magnetised.

[bradyb]

Here’s another demagnetizer that’s more interesting - forgot about this one and just found it.

Don’t have a regulator to check right away but I’ll wear one of these watches and check it in a few days.

[blue16613]

OMG Brady!
These things look like torture devices from some chamber of horrors!
Do you have anything that won't scare the crap out of family or friends??

[bradyb]

Originally Posted by padi56

depending on resting position he can get it to about +2 seconds per day,so his watch is NOT magnetised.

Good point - and I'll wear one that I just demagnetized and try to remember to report back in a week or so.

[Xerxes77]

On my Sub 116613LN work
On the day the watch lose-1 sec and in the night I let the watch with dial up and the watch work + 1 sec!
So after two mounth my Sub have perfect accuracy!

[bradyb]

About 4 weeks ago I ran 2 GMTs (BLRO and BLNR) through a demagnetizer a few times and so far I'm seeing +15 seconds total gain on the BLRO. And this is resting crown-up, where before the demag I would have been at about +3 minutes, which is 8-10 seconds gained per day unless I placed the watch face-down or crown-down at night to regulate it.

Obviously not a very accurate comparision but nobody really cares anyway. But just for fun, next I’ll try it resting crown down for a couple of weeks to see if this ~15-sec gain goes away (which would make sense I suppose).

And the BLNR was running fast at about the same amount but I haven't tried it yet as I can't seem to get that other one off my wrist (it really is that good - even with the brushed center links).

So the bottom line is if your watch is running fast then demagnetizing may help…. or it might not.

[bradyb]

About 4 weeks ago I ran 2 GMTs (BLRO and BLNR) through a demagnetizer and so far I'm seeing +15 seconds total gain on the BLRO. And this is resting crown-up, where before the demag I would have been at about +3 minutes, which is 8-10 seconds gained per day unless I placed the watch face-down or crown-down at night to regulate it.

Obviously not a very accurate comparision but nobody really cares anyway. But just for fun, next I’ll try it resting crown down for a couple of weeks to see if this ~15-sec gain goes away (which would make sense I suppose).

And the BLNR was running fast at about the same amount but I haven't tried it yet as I can't seem to get that other one off my wrist (it really is that good - even with the brushed center links).

So the bottom line is if your watch is running fast then demagnetizing may help…. or it might not.