Timekeeping question - large positional variation

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Bp1000

·May 29, 2021

Hi all

Question prompted because I have a rogue 1861 powered speedmaster. Rogue I say because it’s behaving fairly strangely.

I’ve just had this monitored on a timegrapher it was +6 and amplitude was over 300. It was described as a brand new and healthy watch. It was purchased in 2018.

Issue, dial up its perfect, flat to maybe +1 as the measurements suggest. However, if left crown down it will loose -10 in just a few hours. Over night its losses are around -22. Crown up slightly less, about -17 overnight. Dial down, less still about -8.

Any ideas what’s causing such a huge variation in positional timekeeping? I have other 1861 powered watches which have just a few seconds difference in positional variance time keeping.

Pretty hard to keep this watch any better than -8 each day. I’m just curious what’s causing such a big variation. It’s still in warranty.

 

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SkunkPrince

·May 29, 2021

It could be magnetized. As is, it’s out of spec and I would take it back for warranty service.

 

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M'Bob

·May 29, 2021

SkunkPrince

It could be magnetized. As is, it’s out of spec and I would take it back for warranty service.

Interesting. I would have thought higher rates if magnetization were the issue.

 

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SkunkPrince

·May 29, 2021

M'Bob

Interesting. I would have thought higher rates if magnetization were the issue.

Depends on which direction it was facing when it was magnetized.

 

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M'Bob

·May 29, 2021

SkunkPrince

Depends on which direction it was facing when it was magnetized.

I see what you’re saying, I’m just having trouble sorting out how this would happen relative to how magnetization typically affects the hairspring. Or are you thinking it’s a non-hairspring issue?

 

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Archer

·May 29, 2021·Omega Qualified Watchmaker

Bp1000

I’ve just had this monitored on a timegrapher it was +6 and amplitude was over 300.

Did you take more than one reading in one position? If not, that is the first step.

 

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Bp1000

·May 29, 2021

Archer

Did you take more than one reading in one position? If not, that is the first step.

I didn’t unfortunately, I actually took it somewhere to get it de-magnitised and the reading was after, dial up.

 

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Gruesome

·May 29, 2021

You could measure the rates in all positions over a week, winding the watch once a day, and letting it rest in each position for a whole day.
Essentially doing your own chronometer test.
That way you know where you are at.

Of course, a timegrapher is also a fun toy, and the Chinese Weishi is cheaper than most watches.

 

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Archer

·May 29, 2021·Omega Qualified Watchmaker

Bp1000

I didn’t unfortunately, I actually took it somewhere to get it de-magnitised and the reading was after, dial up.

Rates, balance amplitudes, and beat error in the other positions might give some clue, but without that there's really no way to tell what the cause is.

You are fully winding it once per day, correct?

 

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Bp1000

·May 29, 2021

Archer

Rates, balance amplitudes, and beat error in the other positions might give some clue, but without that there's really no way to tell what the cause is.

You are fully winding it once per day, correct?

I am yes, consistent 19-20 full wounds at the same time each day.

I may even get myself a timing machine as it may be useful for my other watches.

 

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Dan S

·May 29, 2021

Bp1000

I am yes, consistent 19-20 full wounds at the same time each day.

Does this result in a full wind? Or are you just arbitrarily stopping after 20 turns?

 

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hronists

·May 29, 2021

Bp1000

I am yes, consistent 19-20 full wounds at the same time each day.

I may even get myself a timing machine as it may be useful for my other watches.

Full winding is until crown stops not some number of turns.

 

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Bp1000

·May 29, 2021

I know guys thanks

I was just saying the daily wind is a consistent 20 full turns until it won’t wind any more.

Its about 47 winds from zero power.