Seiko monster running v fast

[lewie]

I’ve a mk1 monster that’s gaining crazy time(poss an hour a day)
Lepsi app shows it as magnatized- I’ve tried an inexpensive demagnetiser but with no joy
Any other methods ?
Thanks

[JasonM]

Possibly the balance hairspring is hung up ? They sometimes stick to itself somewhere.

[lewie]

Possibly the balance hairspring is hung up ? They sometimes stick to itself somewhere.

Jase
Thanks just took a quick peek
Does this look hung up?
I think so
Untitled by biglewie, on Flickr

[number2]

Possibly the balance hairspring is hung up ? They sometimes stick to itself somewhere.

Yeah, if not magnetised a hung hairspring is definitely a possibility.

[Russ]

Possibly the balance hairspring is hung up ? They sometimes stick to itself somewhere.

Good chance it's this. It had happened to a friend of mine's Monster gen 1 a few years ago. I managed to free it for him.

[lewie]

I’ve had it running face down for a couple of hours and seem to run much better - does that give any clues?

[walkerwek1958]

Sorry, but I do not believe an app on a phone can detect whether a watch has become magnetised. When a watch gets magnetised it's the hairspring that's affected, not the watch case! If someone can explain how a phone app can detect this condition I'm willing to learn.

It's possible that the hairspring has become snagged and it's possible the watch has become magnetised. If the watch has been demagnetised correctly and shown no improvement perhaps we can discount the latter.

Suggest you send it to a repairer, I'm not volunteering because I`m far too busy with other priorities at the moment, watch activities may resume in the autumn.

[walkerwek1958]

I’ve had it running face down for a couple of hours and seem to run much better - does that give any clues?

Get it to a repairer, it isn`t like a grazed knee that'll heal up. There's obviously a problem and beyond the magnetised or snagged hairspring suggestions it's a waste of time speculating. I`m sure I could sort this but it's probably wise to fully strip and service the watch rather than look for a quick fix. At the moment I`m up to my eyeballs in jobs that don't involve watches (classic car is in pieces again too) so I'm turning everything down at the moment except for stuff I`ve agreed to do.

[Thewatchbloke]

The hairspring is not centralised, you can see the coils touching on one side, this is what will be causing the large rate gain.

If the watch has been correctly demagnetised you can rule that out as a cause so either the hairspring is contaminated (usually oil or grease) causing the coil to stick to itself, or it has been bent/damaged and is out of shape.

The fact it runs better dial down would lead me to believe that the hairspring has been deformed/damaged as any contamination causing the coils to stick together should be evident no matter the watch position.