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Robbie68 · 10 June 2013, 01:10 PM

I recently picked up a barely used 352. The condition was great, the watch being about two years old but looked like new. After initial winding I noticed it was gaining time quite dramatically, up to ten seconds per hour. My first thought, it was magnetized but I was away on business so couldn't degausse. Anyway, I started to check it every hour and it began to slow and run okay, about +10, a bit fast I know but not terrible. The weird thing was though it would run around + 10 but then suddenly gain 10-15 seconds in one hour, then run okay for the next few hours. I've owned "nice" mechanical watches for twenty years and never had one that could run accurately for up to a day and then suddenly gain time so to put it mildly I wasn't happy. My theory is the rotor was magnetized so if I was moving a lot it wasn't having a significant effect on timing, if I was still and the rotor happened to be lying over the balance for an hour or so, it would gain. Degaussed when I got home and now runs at a steady +4. Thought I'd share in case anyone else had encountered such erratic running.

kilyung · 10 June 2013, 01:30 PM

Take it in for a checkup.

Robbie68 · 10 June 2013, 02:15 PM

Maybe not clear in my original post, after degaussing it now run perfectly at +4.

kilyung · 10 June 2013, 02:38 PM

An. Missed that. More than likely it was the hairspring that was magnetized.

10 June 2013, 01:10 PM	#1
Robbie68 "TRF" Member Join Date: Aug 2012 Location: NH Watch: SD4K Posts: 492	Interesting Problem I recently picked up a barely used 352. The condition was great, the watch being about two years old but looked like new. After initial winding I noticed it was gaining time quite dramatically, up to ten seconds per hour. My first thought, it was magnetized but I was away on business so couldn't degausse. Anyway, I started to check it every hour and it began to slow and run okay, about +10, a bit fast I know but not terrible. The weird thing was though it would run around + 10 but then suddenly gain 10-15 seconds in one hour, then run okay for the next few hours. I've owned "nice" mechanical watches for twenty years and never had one that could run accurately for up to a day and then suddenly gain time so to put it mildly I wasn't happy. My theory is the rotor was magnetized so if I was moving a lot it wasn't having a significant effect on timing, if I was still and the rotor happened to be lying over the balance for an hour or so, it would gain. Degaussed when I got home and now runs at a steady +4. Thought I'd share in case anyone else had encountered such erratic running.

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10 June 2013, 01:30 PM	#2
kilyung 2024 SubLV41 Pledge Member Join Date: Jul 2009 Location: Cave Watch: Sundial Posts: 33,940	Take it in for a checkup.

10 June 2013, 02:15 PM	#3
Robbie68 "TRF" Member Join Date: Aug 2012 Location: NH Watch: SD4K Posts: 492	Maybe not clear in my original post, after degaussing it now run perfectly at +4.

10 June 2013, 02:38 PM	#4
kilyung 2024 SubLV41 Pledge Member Join Date: Jul 2009 Location: Cave Watch: Sundial Posts: 33,940	An. Missed that. More than likely it was the hairspring that was magnetized.

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