When your watch goes wild

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Timnic54

NWBIG
Horologist
Jan 16, 2018
1,117
1,747
163
Bangkok
Not much talked about , but adherence to this factor can save you money, trauma and aggravation.

I am talking about magnetism .

Modern watches have some in built resistance to acquiring magnetism. However this can be grossly inadequate in most cases

When you watch acquires magnetism it will run wildly out of time, you won't realise why and you will spend unnecessary time and money trying to get it right.

When your watch goes wild for no apparent reason your first port of call should be a simple demagnetiser , you can pick them up somewhere like Aliexpress for almost nothing.

In many cases the wild watch will return to sanity very quickly after degaussing

So where does this acquired magnetism come from ?

Shop counters. They very often have powerful magnets for the removal of security tags

Loudspeakers Although many have protection, since the decline of CRT screens, this is considered less important and of late is largely phased out. Car door speakers can be particularly aggressive.

Microphones These in varying forms can have such an effect

Guitar pick ups They can be very nasty .

Power tools . The electric motors can produce a very aggressive magnetic field.

Be interesting to hear of other areas where hidden magnetic fields can attack your watch

Hear is a link to a VFM de magnetiser, I am sure there are many others.

https://www.aliexpress.com/item/Watch-Repair-Screwdriver-Tweezers-Electrical-Demagnetizer-Demagnetize-Tool-EU-US/32833733811.html?spm=2114.search0104.3.17.2aafe2c9piCF21&ws_ab_test=searchweb0_0,searchweb201602_5_10152_10151_10065_10344_10068_10342_10343_10340_10341_10084_10083_10618_10630_10307_5711211_5722313_10313_10059_10534_100031_10103_10627_10626_10624_10623_10622_10621_10620_10142_5711312,searchweb201603_25,ppcSwitch_5&algo_expid=e84ca26e-17af-4411-ba46-170eb9106e4d-2&algo_pvid=e84ca26e-17af-4411-ba46-170eb9106e4d&priceBeautifyAB=0
 

TinaTime

Well-known member
Feb 11, 2018
78
72
18
@Timnic54 Very good advice. I recently bought a mesh watch bracelet with a magnetic clasp for a quartz watch. I debated whether or not this was a good idea because I was well aware I would need to keep it far from mechanical watches for all the reasons you outlined.

Anyway, it was easy to install as it had quick release spring bars and it looked and felt very good on the wrist. All was well until I took the watch off to wash some dishes and forgot to keep the magnetic clasp from attaching itself to the case back of the watch. When I put the watch back on it had been totally stopped. I pried the clasp loose from the watch case and the watch started back up. I don't know if I've done any damage to the watch that I'll discover down the road or not. But, lesson learned, keep magnets away from watches, even those that are not mechanical.

I had to learn the mechanical watches and magnets don't mix lesson the hard way too. Again, I knew you should keep magnets away from mechanical watches but, forgot my iPad Pro has a "smart magnetic case". I laid a vintage watch on top of the cover one night and well, you know what happened.

I thought about buying a demagnetizer, because as you wisely point out, magnets are everywhere. I even looked at the model you linked to, but it was on Amazon for 2 bucks more. I don't know what I was waiting for? Your post? I'll be signing off to make that purchase now. Thanks for the push.
 
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Sinnknowmore

Member
Feb 25, 2018
8
5
3
USA
To properly demagnetize a watch movement you need to disassemble the movement and demag each part. My friend is a watchmaker and I told him I need to demag my Tudor and was going to use an industrial demagnetizer at work. He said “what are you crazy give me the watch I’ll take care of it.


Sent from my iPad using Tapatalk
 

Muiramas

New member
Feb 25, 2018
4
0
1
Great post. This may be useful to some folks...

Edit, too noob to post a link. There's an app by Lepsi you can use to check if your watch is magnetised.
 
OP
Timnic54

Timnic54

NWBIG
Horologist
Jan 16, 2018
1,117
1,747
163
Bangkok
To properly demagnetize a watch movement you need to disassemble the movement and demag each part. My friend is a watchmaker and I told him I need to demag my Tudor and was going to use an industrial demagnetizer at work. He said “what are you crazy give me the watch I’ll take care of it.


Sent from my iPad using Tapatalk

Certain watch cases will preclude demagnetising in situ, but they are rare and watches in such cases are unlikely to become magnetised. In most cases placing the whole watch within the field and withdrawing it slowly in various orientations will suffice. No need to dismantle.
 
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Subterfuge

Member
Mar 10, 2018
33
24
8
thanks for this! i actually send a text off to my course instructor re: a 1950s jlc with a p469 movement that's losing anywhere up to 15-30mins a day. i'm sure he will bring up the possibility of bad magnetisation when i bring it down tomorrow. Hopefully a visit to the demagnetiser should sort my watch out!
 
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