Magnetic field

[East Bay Rider]

I wear a GMT-II but the company I work for makes magnets

After reading about the new Milgauss and it's resistance to magnetic flux, I'm starting to wonder if my GMT is going to do well in this environment and what happens if I ever wear my GMT near any magnetic fields.
I've never had any problems wearing a quartz watch in the shop, just how sensitive is my new Rolex and what will happen if I get too close to a magnet?

[Thani]

ONLY the milgauss is anti-magnetic

so my suggestion is to BUY A MILGAUSS !! lool

good luck !

[SPACE-DWELLER]

Well, all Rolex watches are antimagnetic to an extend.

To get the classification "antimagnetic", a movement must be able to go precisely after having been subjected to a magnetic field of 4,800 A/m (Ampere per meter).

There are two ways of making a watch antimagnetic (quoted from Wikipedia):

"The first way consists in using different alloys, capable to withstand magnetic fields. Such alloys as Invar (iron - nickel - carbon - chromium alloy), Glucydur (beryllium - bronze alloy), Nivarox (iron - nickel - chromium - titanium - beryllium alloy) and Elinvar - an alloy similar to Invar, though less resistant to magnetism and more resistant to thermal influence. Due to different components these alloys have different properties. They were differently used by various watch-making brands. However, since the 50's Nivarox and Glucydur were extensively used by the watchmakers. Starting with the 60's almost all Swiss watches had Glucydur balance and Nivarox hairsprings. The anchors, escape wheels and other parts of mechanism were also made of non-magnetic metals or alloys.
Another way of making a watch non-magnetic is to house the entire movement into a case made of a highly conductive (permeable) material. The movement is covered by an additional soft-iron clasp to prevent the forming of magnetic fields inside the watch itself."


I work in an environment (single office) with 14 PC's around me and close by non-stop, and my Rolex watch is still spot on!

There is much hysteria about the influence of magnetism on watches. You would almost have to virtually place your watch on top of a big loudspeaker for several hours to have your watch magnetised.

BTW: The Milgauss is not the only (super)antimagnetic Rolex that Rolex has made: The Oysterquarz was antimagnetic to 1,000 Oersted (another designation of antimagnetism), and the Milgauss is antimagnetic to 1,000 Tesla (yet another term), but the same as 1,000 Gauss (to use another term again!).

Another step in the fight again magnetism is the new Parachrom Bleu hairspring which is inside the Daytona, Milgauss, new GMT II and YM II. That balance is virtually impervious to the influence of magnetism.

[Lol-x]

Bill don't tell me you make stereo speakers?

It probably will not be a problem, but you might wish to check how your watch goes for time keeping. If it starts going out by more than +10 second per day, then there might be something to start worrying about.

[East Bay Rider]

Originally Posted by Lol-x

Bill don't tell me you make stereo speakers?

It probably will not be a problem, but you might wish to check how your watch goes for time keeping. If it starts going out by more than +10 second per day, then there might be something to start worrying about.

No, not stereo speakers but close. I work for a company that makes magnetic mechanical rotary face seals. All of our magnets are cylindrical. Because of the speeds and pressures our product may see many of our magnets have 4 poles and magnetic pulls upwards of 10#.
Luckily, usually when I deal with parts they are in a demagnetized state.
BUT
I just checked www.time.gov and my watch is only behind about 2 seconds and I last set it on the day we set our clocks back 1 hour for daylight savings time.
That seems kind of incredible so I will continue to monitor it.

[mborkow]

this is only anecdotal, but i have noticed that my watch runs a little slowly after heavy laptop use and my laptop's hard drive is directly under where i rest my wrist.

[Jedi]

mborkow, this could be due to your relatively sedentary posture (as far as wrist movements are concerned) during laptop use. Like dial up overnight on the night stand.

Just a thought.

Because I don't think laptop use has much magnetic effect on watches.

Just my opinion.

[mborkow]

Originally Posted by JediSubExII

mborkow, this could be due to your relatively sedentary posture (as far as wrist movements are concerned) during laptop use. Like dial up overnight on the night stand.

that should make it gain time...

[Jedi]

Not necessarily sir. Dial up on my black face EXP II seems to lose time.

Those positions are a rough guide only and quite often, the newer fast beat (28k plus) movements react differently.