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mountainjogger · 28 August 2010, 07:49 AM

A couple of months ago my Explorer I began to run about 15 second fast per day (as checked against newly uploaded official time). I was not a happy camper.

Fortunately it is still under original Rolex manufacturer warranty so I took it to my AD.

When I got it back, the AD told me that it had to be de-magnitized and to keep it away from whatever source of magnetism I was exposing it to.

I was a little skeptical but tried downloading an app for my iphone 3gs which measures magnetic fields.

The answer? I was storing the watch in the evening near my macbook pro which has a magnetic coupler for the power cord. It sent the iphone app off the chart.

Upside? My Explorer I is now running better than w/1 second per day and I have learned a valuable lesson. Watch out for magnetic fields in computers and be careful where you park your watch when you take your boots off for the night!

Redeye · 28 August 2010, 08:00 AM

Good point. I wonder if this is why Rolex came out with the Parachrom hairspring?

Theoretically, the Parachrom hairspring should prevent this.

RRGHOST1 · 28 August 2010, 08:00 AM

Thats something you would never think about, good info.

Z-Sub · 28 August 2010, 08:03 AM

parachrom is only part of the solution. the rest of the parts are still steel. It happened to several of my watches as well and Rolex took care of them

Dan Pierce · 28 August 2010, 08:13 AM

Good to know, thanks.

dP

paverman · 28 August 2010, 08:16 AM

Great info. I supose I should also stop laying my DD on top of my industrial electro magnet as well.

kcmo · 28 August 2010, 08:30 AM

Very interesting! Thanks for sharing.

mountainjogger · 28 August 2010, 08:48 AM

Forgot to say that I have never had this problem with my ss sub date. It was parked in the same place. Maybe because of the thicker case?

Tools · 28 August 2010, 08:51 AM

Rolex developed their own Parachrom hairspring because ETA announced (several years back) that after this year they would no longer provide Nivarox-FAR hairsprings to non Swatch companies...

It had nothing to do with any shortcomings with the Nivarox hairsprings used which too are anti-magnetic..

As said though, many of the other parts are still influenced by a magnetic field... except the Milgauss, which is made of different metal alloys. However, it too is only guaranteed up to 1000 Gauss before a strong magnetic field will affect it's operation.......

rfknauss · 28 August 2010, 09:38 AM

Interesting ...... thanks for sharing!

stockae92 · 28 August 2010, 10:10 AM

Good info :-)

Now, that's why you NEED a Milgauss

esm · 28 August 2010, 10:14 AM

good info on the Mac book pro!

I always make sure that the watches are well away from the speakers also.

mountainjogger · 28 August 2010, 10:59 AM

Now I do too.

28 August 2010, 07:49 AM	#1
mountainjogger 2024 Pledge Member Join Date: Aug 2010 Real Name: H Location: North Carolina Watch: M99230B-0008 Posts: 5,675	Be careful where you park your watch (magnetism lesson; why my watch ran fast) A couple of months ago my Explorer I began to run about 15 second fast per day (as checked against newly uploaded official time). I was not a happy camper. Fortunately it is still under original Rolex manufacturer warranty so I took it to my AD. When I got it back, the AD told me that it had to be de-magnitized and to keep it away from whatever source of magnetism I was exposing it to. I was a little skeptical but tried downloading an app for my iphone 3gs which measures magnetic fields. The answer? I was storing the watch in the evening near my macbook pro which has a magnetic coupler for the power cord. It sent the iphone app off the chart. Upside? My Explorer I is now running better than w/1 second per day and I have learned a valuable lesson. Watch out for magnetic fields in computers and be careful where you park your watch when you take your boots off for the night!

28 August 2010, 08:00 AM	#2
Redeye "TRF" Member Join Date: Mar 2009 Location: Canada Posts: 76	Good point. I wonder if this is why Rolex came out with the Parachrom hairspring? Theoretically, the Parachrom hairspring should prevent this. __________________ Rolex Date Rolex Milgauss GV Rolex DeepSea Sea Dweller

28 August 2010, 08:03 AM	#4
Z-Sub 2024 Pledge Member Join Date: Jun 2008 Location: So Cal, USA Watch: Not a ONEWatch Man Posts: 7,383	parachrom is only part of the solution. the rest of the parts are still steel. It happened to several of my watches as well and Rolex took care of them __________________ SS Submariner Date "Z" SS SeaDweller "D" SS Submariner "Random" TT Blue Submariner "P" SS GMT-Master ll "M", Pepsi Pam 311, 524, 297

28 August 2010, 08:13 AM	#5
Dan Pierce 2024 Pledge Member Join Date: Dec 2006 Real Name: D'OH! Location: Kentucky Watch: Rolex-1 Tudor-3 Posts: 36,217	Good to know, thanks. dP __________________ TRF Member# 1668 Bass Player in TRF "AFTER DARK" Bar & NightClub Band Commander-in-Chief of The Nylon Nation The Crown & Shield Club Honorary Member of P-Club

28 August 2010, 08:51 AM	#9
Tools TRF Moderator & 2024 SubLV41 Patron Join Date: May 2007 Real Name: Larry Location: Mojave Desert Watch: GMT's Posts: 43,515	Rolex developed their own Parachrom hairspring because ETA announced (several years back) that after this year they would no longer provide Nivarox-FAR hairsprings to non Swatch companies... It had nothing to do with any shortcomings with the Nivarox hairsprings used which too are anti-magnetic.. As said though, many of the other parts are still influenced by a magnetic field... except the Milgauss, which is made of different metal alloys. However, it too is only guaranteed up to 1000 Gauss before a strong magnetic field will affect it's operation....... __________________ (Chill ... It's just a watch Forum.....) NAWCC Member

28 August 2010, 08:00 AM	#3
RRGHOST1 "TRF" Member Join Date: Dec 2009 Real Name: luke standing Location: england Watch: Rolex TT SubC Blue Posts: 3,997	Thats something you would never think about, good info.

28 August 2010, 08:16 AM	#6
paverman "TRF" Member Join Date: Jan 2010 Real Name: Ken Location: Illinois Watch: Too many Posts: 2,870	Great info. I supose I should also stop laying my DD on top of my industrial electro magnet as well.

28 August 2010, 08:30 AM	#7
kcmo "TRF" Member Join Date: Jan 2007 Real Name: Karis Location: USA Posts: 19,377	Very interesting! Thanks for sharing.

28 August 2010, 08:48 AM	#8
mountainjogger 2024 Pledge Member Join Date: Aug 2010 Real Name: H Location: North Carolina Watch: M99230B-0008 Posts: 5,675	Forgot to say that I have never had this problem with my ss sub date. It was parked in the same place. Maybe because of the thicker case?

28 August 2010, 09:38 AM	#10
rfknauss 2024 SubLV41 Pledge Member Join Date: Nov 2009 Real Name: Richard Location: Macungie, PA Watch: 5513 Sub, LV Sub Posts: 14,497	Interesting ...... thanks for sharing! __________________ *"Few things in life give man as great a pleasure as wearing a Rolex!"* TRF's "AFTER DARK" Bar & NightClub Patron

28 August 2010, 10:10 AM	#11
stockae92 2024 Pledge Member Join Date: Oct 2009 Location: Socal Posts: 4,964	Good info :-) Now, that's why you NEED a Milgauss

28 August 2010, 10:14 AM	#12
esm "TRF" Member Join Date: Jul 2008 Real Name: Eric Location: Location,Location Watch: this, bro... Posts: 15,340	good info on the Mac book pro! I always make sure that the watches are well away from the speakers also.

28 August 2010, 10:59 AM	#13
mountainjogger 2024 Pledge Member Join Date: Aug 2010 Real Name: H Location: North Carolina Watch: M99230B-0008 Posts: 5,675	Now I do too.

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