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Wehtiko · 1 August 2012, 02:12 PM

Tried to post something like this earlier, but it didn't take.

I've had my brand new Explorer II white dial (216570) for about a week now. My wife had my brother-in-law, Randy, buy it in Saudi Arabia where he works.

I started measuring its accuracy almost immediately & found that for the first few days it was fast by anywhere from 11 to about 26 seconds per day. It bugged me because this is a Rolex not a Timex. Brought this up to you good people on this forum and got the advise to wait for it to 'break in'.

Sure enough, now my watch is only fast by about 5 seconds. What I wonder about is what causes this?! Does anyone know? Is it common? Is the watch actually adjusting itself to me? Does my body adjust itself to the watch? It was a quick change from Saudi Arabia to Alberta; it was a sudden change to my wrist. Is it the electrical fields of our bodies; heartbeat; change in electromagnetic fields; gravity... aliens?

It seems a little strange that such a 'breaking in' happens.

At least I may not have to have it calibrated.

EE33 · 1 August 2012, 02:37 PM

Did you wind the watch fully prior to wearing it for the first time?

dpkong · 1 August 2012, 11:18 PM

When I got mine, it was running pretty good at first and then about a month later, it has started losing a few seconds daily. I am going to wear it a few more months before sending it to the RSC for a calibration. It's a mechanical device with lots of gears and stuff in there so they will take a bit of time to "break-in".

mjclark32 · 1 August 2012, 11:22 PM

Probably just needed a little break in period to get all the oil around to the gears (I'm no engineer!)
Congrats on the results though

Psmith · 1 August 2012, 11:32 PM

I've never really believed in a mechanical breaking-in - after all, the movements are given pretty brutal treatment at the COSC. Perhaps it's more of a settling down in terms of the movement running constantly...

Over the years, I've only noticed one watch alter from new. A GMT II C ran very fast ~ +10/day out of the box for a few days, then suddenly changed to running dead-on. Just regular wear, and no special positioning when off the wrist

I'll save Peter the trouble of saying that +5 seconds out of the 86,400 in a day is not bad, and that your watch is now running within COSC spec (-4, +6)

Whiskeymike · 1 August 2012, 11:36 PM

Don't forget that laying it face up or face down at night causes it to gain or lose respectively.

Rocco22 · 1 August 2012, 11:40 PM

The only Rolex I've had that is within 5 seconds a day is my new sub hulk,all the other ones are 10-20 seconds a day.that includes explorer,other subs,date just,airkings and ym.

1 August 2012, 02:12 PM	#1
Wehtiko Member Join Date: Sep 2011 Real Name: Trevor Location: Edmonton, Canada Watch: Explorer II 216570 Posts: 130	Fascinating Tried to post something like this earlier, but it didn't take. I've had my brand new Explorer II white dial (216570) for about a week now. My wife had my brother-in-law, Randy, buy it in Saudi Arabia where he works. I started measuring its accuracy almost immediately & found that for the first few days it was fast by anywhere from 11 to about 26 seconds per day. It bugged me because this is a Rolex not a Timex. Brought this up to you good people on this forum and got the advise to wait for it to 'break in'. Sure enough, now my watch is only fast by about 5 seconds. What I wonder about is what causes this?! Does anyone know? Is it common? Is the watch actually adjusting itself to me? Does my body adjust itself to the watch? It was a quick change from Saudi Arabia to Alberta; it was a sudden change to my wrist. Is it the electrical fields of our bodies; heartbeat; change in electromagnetic fields; gravity... aliens? It seems a little strange that such a 'breaking in' happens. At least I may not have to have it calibrated. Attached Images

1 August 2012, 02:37 PM	#2
EE33 "TRF" Member Join Date: Feb 2010 Real Name: Des Location: China Watch: 16613 16710 116520 Posts: 2,841	Did you wind the watch fully prior to wearing it for the first time? __________________ *TRFs "after Dark" bar and NightClub Addict* Punctuality is the courtesy shown only by Kings Dalip: "GTG posts are worthless without pics, absolutely worthless"

1 August 2012, 11:22 PM	#4
mjclark32 "TRF" Member Join Date: Mar 2010 Real Name: MJC Location: PHL USA Watch: IWC, Rolex, AP Posts: 29,232	Probably just needed a little break in period to get all the oil around to the gears (I'm no engineer!) Congrats on the results though __________________

1 August 2012, 11:32 PM	#5
Psmith "TRF" Member Join Date: Sep 2008 Real Name: Clive Location: Exoplanet Watch: spring-driven Posts: 38,856	I've never really believed in a mechanical breaking-in - after all, the movements are given pretty brutal treatment at the COSC. Perhaps it's more of a settling down in terms of the movement running constantly... Over the years, I've only noticed one watch alter from new. A GMT II C ran very fast ~ +10/day out of the box for a few days, then suddenly changed to running dead-on. Just regular wear, and no special positioning when off the wrist I'll save Peter the trouble of saying that +5 seconds out of the 86,400 in a day is not bad, and that your watch is now running within COSC spec (-4, +6) __________________

1 August 2012, 11:18 PM	#3
dpkong "TRF" Member Join Date: Jan 2010 Real Name: Don Location: Borneo Watch: it! Posts: 864	When I got mine, it was running pretty good at first and then about a month later, it has started losing a few seconds daily. I am going to wear it a few more months before sending it to the RSC for a calibration. It's a mechanical device with lots of gears and stuff in there so they will take a bit of time to "break-in".

1 August 2012, 11:36 PM	#6
Whiskeymike "TRF" Member Join Date: Jul 2012 Real Name: Bill Location: Kennesaw,Ga. Watch: GMT II;SS DJ Posts: 16	Don't forget that laying it face up or face down at night causes it to gain or lose respectively.

1 August 2012, 11:40 PM	#7
Rocco22 Banned Join Date: Jun 2012 Location: Mass/Vegas/disney Watch: Hulk,114060,14060 Posts: 929	The only Rolex I've had that is within 5 seconds a day is my new sub hulk,all the other ones are 10-20 seconds a day.that includes explorer,other subs,date just,airkings and ym.

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