C9 Single Pusher timekeeping

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Victor88
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C9 Single Pusher timekeeping

Post by Victor88 » Sat Jun 29, 2019 10:35 am

Hi all

Woke up this morning to find my C9 had lost 2h 20 minutes. Oddly it was still ticking so not sure what gives. I’d wound it yesterday evening about half full so there should have been enough reserve to continue through the night. The chronograph was not running. Recallibrated it this morning and seems to be ok thus far. Question is if anyone else has experienced anything similar?

Thanks.

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Amor Vincit Omnia
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Re: C9 Single Pusher timekeeping

Post by Amor Vincit Omnia » Sat Jun 29, 2019 10:41 am

You say it's running OK now?

Check it tomorrow morning and if it has done the same there might be a problem with something sticking around the date changeover. I had that happen with a vintage watch once.
Steve
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H0rati0
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Re: C9 Single Pusher timekeeping

Post by H0rati0 » Sat Jun 29, 2019 10:49 am

Before panicking, are you absolutely sure it was set correctly in the first place? I ask because if the power reserve was nearly exhausted but the watch had continued running it should have gained and I have done the same sort of thing myself eg incorrect setting by 10 minutes and then wondering why my watch was wrong against a radio controlled clock.

Another possibility is that it had actually stopped but when you picked it up that impulse started it again so it would seem as if it had run continuously. I would only trust the watch to run to power reserve after a full wind, unpredictable things happen with isochronism.

I do hope you just had a glitch and the watch itself is fine.
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Re: C9 Single Pusher timekeeping

Post by Amor Vincit Omnia » Sat Jun 29, 2019 11:09 am

H0rati0 wrote:
Sat Jun 29, 2019 10:49 am
...I have done the same sort of thing myself eg incorrect setting by 10 minutes and then wondering why my watch was wrong against a radio controlled clock.
Glad I'm not the only one who has Senior Moments. I did that with my C65 Diver the other week.

@Victor88 - keep us updated, mate.
Steve
The half minute which we daily devote to the winding-up of our watches is an exertion of labour almost insensible; yet, by the aid of a few wheels, its effect is spread over the whole twenty-four hours.
Charles Babbage


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Re: C9 Single Pusher timekeeping

Post by H0rati0 » Sat Jun 29, 2019 11:20 am

Amor Vincit Omnia wrote:
Sat Jun 29, 2019 11:09 am

Glad I'm not the only one who has Senior Moments. I did that with my C65 Diver the other week.

It's disturbing, but the alternatives are worse!
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Re: C9 Single Pusher timekeeping

Post by Victor88 » Sat Jun 29, 2019 1:16 pm

Hi all

Thanks for the quick feedback. Think Horatio’s comment on impulse power may be the answer - will give it a full wind tonight and see where things are tomorrow (no date on a C9 monopusher of course.)

Thanks!

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Re: C9 Single Pusher timekeeping

Post by rcherryuk » Sat Jun 29, 2019 3:44 pm

Be careful not to over wind it, if you wind it fully it will stop after a couple of minutes, only way to fix it, let the stopwatch run for a few minute to release some tension on the mainspring.
Problem acknowledged by JJ himself, and this was his advice.
Rob

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Re: C9 Single Pusher timekeeping

Post by Victor88 » Sat Jun 29, 2019 9:15 pm

Thanks Rob, will bear that in mind.

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Re: C9 Single Pusher timekeeping

Post by MiniMpi » Sat Jun 29, 2019 10:13 pm

rcherryuk wrote:Be careful not to over wind it, if you wind it fully it will stop after a couple of minutes, only way to fix it, let the stopwatch run for a few minute to release some tension on the mainspring.
Problem acknowledged by JJ himself, and this was his advice.
Great information Rob, I wasn't aware of that.
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