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Old 19 March 2018, 04:42 AM   #1
Maiden
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Sub C Power Reserve

HI all, I have noticed my 4 year old Sub C's power reserve is down to about 41 hours. It actually achieved 50 hours when I first bought it. I suspect the watch is a little older than 4 years as the serial dates to around 2011 although I get that is not exact. It was bought new at an AD back in the day when they had several in stock and the 114060 hung around for a while. The good old days!

In any event it is still keeping perfect time, about +1.5 seconds per day. I don't plan to do anything at this point. If it starts keeping time poorly or if I lose a significant amount of power reserve I will send it in.

Just curious on other members thoughts here?

Cheers.
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Old 19 March 2018, 04:43 AM   #2
Etschell
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i wouldnt send it in. not sure what is causing it espeically with the parachrom hairspring.
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Old 19 March 2018, 04:52 AM   #3
SeaDweller50
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Not sure what the balance spring has to do with power reserve. Perhaps the main spring weakens over time?
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Old 19 March 2018, 05:20 AM   #4
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Quote:
Originally Posted by Maiden View Post
4 yr old Sub C's PR down to 41 hrs.I suspect watch older than 4 years as the serial dates to around 2011 it is still keeping perfect time +1.5 sec/d. I don't plan to do anything at this point. If it starts keeping time poorly or if I lose a significant amount of power reserve I will send it in.
Just curious on other members thoughts here?
It indicates the need for a FULL SERVICE. Since you mentioned the watch could be much older, I think the reduction in PR is perhaps due to drying up of lubrication, rarely just a mainspring problem. I don't care whether your watch has the accuracy of a high end super Quartz or not but my advice is don't delay but send your watch for immediate servicing otherwise damages and costs of repair would escalate
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Old 19 March 2018, 05:46 AM   #5
dr35mm
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Let it die, then 30-40 winds and set it. See if it improves but I see no need to send it off.


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Old 19 March 2018, 05:59 AM   #6
Maiden
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Let it die, then 30-40 winds and set it. See if it improves but I see no need to send it off.


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Thanks did that, 50n+ winds just to be sure. 41 hours.
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Old 27 April 2018, 12:30 AM   #7
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Thats what i get from mine also more or less
Ruther dissapointing
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Old 27 April 2018, 12:41 AM   #8
padi56
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Quote:
Originally Posted by Etschell View Post
i wouldnt send it in. not sure what is causing it espeically with the parachrom hairspring.
Why would a parachome hairspring have anything to do with watches power reserve. It's the mainspring which has anything to do with power-reserve.And depending on the state of wind on the mainspring power reserve average 40 -48 hours give or take a hour or so.
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Old 27 April 2018, 12:56 AM   #9
Maiden
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Just an update as this thread kicked up today. Did a few more tests, with 50 plus winds. 48 hours no problem, I guess when I was winding 40 they weren't full turns. My 2015 Bluesy is still at 49.5 half hours so all good in the Sub camp!
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