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TheArchitect · 15 March 2007, 01:55 AM

I had placed my Datejust in a jewelry box the other night and when I took it out the next day I found a small magnet from a lapel "pin" had attached itself to the back of the case. The watch was running 5 minutes fast. Since then, the watch runs about 20 seconds fast each day. What did the magnet do to the watch to make it run fast? Thanks!

President · 15 March 2007, 01:56 AM

Uhoh. That's not good.

roadcarver · 15 March 2007, 01:56 AM

Hair spring could have been tangled. You can bring to your AD / watchsmith to do the untangling. From what I hear, shouldn't take that long.

15 March 2007, 02:08 AM

I doubt the hairspring is "tangled" from the magnet but if the spring is magnetized the coils can stick together, reducing the spring length and making the watch run fast. However, but then I would expect it to run much faster that +20 per day. More like + minutes per day.

Cure is simple - take to to the local watch repair guy and have them demagnetize it. Only takes a few seconds, and does not require opening the watch. If it still runs fast, time for it to be serviced.

padi56 · 15 March 2007, 02:08 AM

Well first cannot see how a magnet could attach to the case back because its made from S.steel.But if your watch was put in a strong magnetic field, the movement balance spring could become magnetised .Now normally a magnetised watch will run very very erratic indeed,and gain several minutes but its simply fixed by have watch demagnetised.But in your case IMHO your watch just need a service or just simple regulating.

President · 15 March 2007, 02:09 AM

Quote:

Originally Posted by Avalon

I doubt the hairspring is "tangled" from the magnet but if the spring is magnetized the coils can stick together, reducing the spring length and making the watch run fast. However, but then I would expect it to run much faster that +20 per day. More like + minutes per day.

Cure is simple - take to to the local watch repair guy and have them demagnetize it. Only takes a few seconds, and does not require opening the watch. If it still runs fast, time for it to be serviced.

Is that all? That's not bad!

Earl · 15 March 2007, 02:23 AM

hard to believe a lapel pin magnet had the strength to do what you described but, with the types of magnets available today it's possible as Padi said the internal main spring could become magnetized and speed up your watch.
__________________

TheArchitect · 15 March 2007, 02:42 AM

Thank you for your feedback. Off to the watchsmith it is!

15 March 2007, 01:55 AM	#1
TheArchitect "TRF" Member Join Date: Mar 2007 Location: Baltimore Posts: 2	Magnet Stuck on Datejust Case I had placed my Datejust in a jewelry box the other night and when I took it out the next day I found a small magnet from a lapel "pin" had attached itself to the back of the case. The watch was running 5 minutes fast. Since then, the watch runs about 20 seconds fast each day. What did the magnet do to the watch to make it run fast? Thanks!

15 March 2007, 01:56 AM	#3
roadcarver "TRF" Member Join Date: Aug 2006 Real Name: Vernon Location: C-a-n-a-d-a Watch: 16600 Posts: 5,641	Hair spring could have been tangled. You can bring to your AD / watchsmith to do the untangling. From what I hear, shouldn't take that long. __________________ I'm just a cook...

15 March 2007, 02:08 AM	#5
padi56 "TRF" Life Patron Join Date: Jun 2005 Real Name: Peter Location: Llanfairpwllgwyng Watch: ing you. Posts: 52,391	Well first cannot see how a magnet could attach to the case back because its made from S.steel.But if your watch was put in a strong magnetic field, the movement balance spring could become magnetised .Now normally a magnetised watch will run very very erratic indeed,and gain several minutes but its simply fixed by have watch demagnetised.But in your case IMHO your watch just need a service or just simple regulating. __________________ ICom Pro3 All posts are my own opinion and my opinion only. "The clock of life is wound but once, and no man has the power to tell just when the hands will stop. Now is the only time you actually own the time, Place no faith in time, for the clock may soon be still for ever." Good Judgement comes from experience,experience comes from Bad Judgement,.Buy quality, cry once; buy cheap, cry again and again. www.mc0yad.club Second in command CEO and left handed watch winder

15 March 2007, 01:56 AM	#2
President Banned Join Date: Dec 2006 Real Name: M.Thatcher MP Location: Le Locle Watch: Bear Grylls Posts: 2,913	Uhoh. That's not good.

15 March 2007, 02:08 AM	#4
---- Guest Posts: n/a	I doubt the hairspring is "tangled" from the magnet but if the spring is magnetized the coils can stick together, reducing the spring length and making the watch run fast. However, but then I would expect it to run much faster that +20 per day. More like + minutes per day. Cure is simple - take to to the local watch repair guy and have them demagnetize it. Only takes a few seconds, and does not require opening the watch. If it still runs fast, time for it to be serviced.

15 March 2007, 02:23 AM	#7
Earl "TRF" Member Join Date: May 2005 Real Name: Who Me? Location: Northern Virginia Watch: out Posts: 4,616	hard to believe a lapel pin magnet had the strength to do what you described but, with the types of magnets available today it's possible as Padi said the internal main spring could become magnetized and speed up your watch. __________________

15 March 2007, 02:42 AM	#8
TheArchitect "TRF" Member Join Date: Mar 2007 Location: Baltimore Posts: 2	Thank you for your feedback. Off to the watchsmith it is!

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