Not getting 56 hours with C63 GMT
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Re: Not getting 56 hours with C63 GMT
^^^^ Not that I'm aware of Andrew.
I've always thought of the quoted reserve as a minimum.
Guy
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I've always thought of the quoted reserve as a minimum.
Guy
Sent from my XPERIA 5 III using Tapatalk
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Re: Not getting 56 hours with C63 GMT
Not sure about these movements, but on reading the METAS certificate for my Omega AT, they do in fact test the power reserve and reject if less that the stated 60 hours
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Re: Not getting 56 hours with C63 GMT
I was curious about this too. I checked the datasheet when this thread was originally posted and it is a minimum. There was a pretty good discussion I heard recently about PR and whether or not 56 is useful. Pretty much anything over 24 gets the job done for a daily and 56 might not get you through a weekend. An interesting discussion to be sure.
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Re: Not getting 56 hours with C63 GMT
Interesting, and that makes a lot of sense in terms of the practicality of a power reserve. I wonder if it’s become a marketing thing then, kinda like the pixel wars with camera sensors? Bigger number for the sake of bigger number.rkovars wrote: ↑Fri Jul 29, 2022 2:44 pm I was curious about this too. I checked the datasheet when this thread was originally posted and it is a minimum. There was a pretty good discussion I heard recently about PR and whether or not 56 is useful. Pretty much anything over 24 gets the job done for a daily and 56 might not get you through a weekend. An interesting discussion to be sure.
Drew
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Re: Not getting 56 hours with C63 GMT
Mostly, yes. But I think a higher PR is also a sign of higher quality materials and better engineering used in the design and build of the movement, indicating better reliability and longevity.jkbarnes wrote: ↑Fri Jul 29, 2022 2:47 pmInteresting, and that makes a lot of sense in terms of the practicality of a power reserve. I wonder if it’s become a marketing thing then, kinda like the pixel wars with camera sensors? Bigger number for the sake of bigger number.rkovars wrote: ↑Fri Jul 29, 2022 2:44 pm I was curious about this too. I checked the datasheet when this thread was originally posted and it is a minimum. There was a pretty good discussion I heard recently about PR and whether or not 56 is useful. Pretty much anything over 24 gets the job done for a daily and 56 might not get you through a weekend. An interesting discussion to be sure.
Alex
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Re: Not getting 56 hours with C63 GMT
I'm not sure the PR alone is an indicator of quality. Just as often it is just a bigger barrel with a bigger mainspring. That is basically how the 300 series of movements gets the increase over the 200 series.ajax87 wrote: ↑Fri Jul 29, 2022 2:54 pmMostly, yes. But I think a higher PR is also a sign of higher quality materials and better engineering used in the design and build of the movement, indicating better reliability and longevity.jkbarnes wrote: ↑Fri Jul 29, 2022 2:47 pmInteresting, and that makes a lot of sense in terms of the practicality of a power reserve. I wonder if it’s become a marketing thing then, kinda like the pixel wars with camera sensors? Bigger number for the sake of bigger number.rkovars wrote: ↑Fri Jul 29, 2022 2:44 pm I was curious about this too. I checked the datasheet when this thread was originally posted and it is a minimum. There was a pretty good discussion I heard recently about PR and whether or not 56 is useful. Pretty much anything over 24 gets the job done for a daily and 56 might not get you through a weekend. An interesting discussion to be sure.
EDIT to add: The some of the 300-1s were 42 hours before they were fully transitioned to 56 (pre-2021). I believe you can retrofit the 300-1s with the newer barrel.
I think it holds true for the seriously crazy PRs like 5 days etc. The SH21 adds a second barrel to get the PR.
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Re: Not getting 56 hours with C63 GMT
Is it possible - and I think it might be considering the mechanics behind these movements - that a magnetised movement (or specifically mainspring) would not only run on bad time but also, as you potentially have coils stuck together through magnetic forces, you lose some PR as well? This may also explain why Omega are happy to fail their movements if they don't pass a high threshold for power reserve as they're also fairly anti-magnetic so would indicate a more serious problem than 'just' a magnetised spring.
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Re: Not getting 56 hours with C63 GMT
Most mainsprings today are non-magnetic (alloys of mostly cobalt and nickel). Hodinkee Mainspring Deep Divemonkeymax wrote: ↑Fri Jul 29, 2022 3:46 pm Is it possible - and I think it might be considering the mechanics behind these movements - that a magnetised movement (or specifically mainspring) would not only run on bad time but also, as you potentially have coils stuck together through magnetic forces, you lose some PR as well? This may also explain why Omega are happy to fail their movements if they don't pass a high threshold for power reserve as they're also fairly anti-magnetic so would indicate a more serious problem than 'just' a magnetised spring.
Omega has a non-magnetic silicon hairspring too. The hairspring is the most likely culprit when a watch is magnetized.
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Re: Not getting 56 hours with C63 GMT
Thanks. I knew that Omega and others use silicon hairsprings (e.g. Tissot and the family of movements similar to the PowerMatic 80) but I wasn't sure whether that applied to ETA and Sellita movements too. If their movements are also mostly nickel and cobalt as the article says, then yes, it won't be that.rkovars wrote: ↑Fri Jul 29, 2022 4:01 pmMost mainsprings today are non-magnetic (alloys of mostly cobalt and nickel). Hodinkee Mainspring Deep Dive
Omega has a non-magnetic silicon hairspring too. The hairspring is the most likely culprit when a watch is magnetized.
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Re: Not getting 56 hours with C63 GMT
ETA and Sellita use Nivarox hairsprings which are ferromagnetic.monkeymax wrote: ↑Fri Jul 29, 2022 4:27 pmThanks. I knew that Omega and others use silicon hairsprings (e.g. Tissot and the family of movements similar to the PowerMatic 80) but I wasn't sure whether that applied to ETA and Sellita movements too. If their movements are also mostly nickel and cobalt as the article says, then yes, it won't be that.rkovars wrote: ↑Fri Jul 29, 2022 4:01 pmMost mainsprings today are non-magnetic (alloys of mostly cobalt and nickel). Hodinkee Mainspring Deep Dive
Omega has a non-magnetic silicon hairspring too. The hairspring is the most likely culprit when a watch is magnetized.
Life is not a matter of holding good cards, but sometimes, playing a poor hand well.
Jack London
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Re: Not getting 56 hours with C63 GMT
Mine neither. One and only time I did anything a bit scientific, I got around 52 hours. It's one of those things I'll probably get around to testing agin when I send it in for its first service.
As for 56 hours? For me, not really enough of a stretch over 38-42 to be any more useful than bog standard.
As for 56 hours? For me, not really enough of a stretch over 38-42 to be any more useful than bog standard.
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Re: Not getting 56 hours with C63 GMT
A higher PR can also be achieved by reducing the movement frequency, without impacting accuracy of a basic three-hander. Affecting the movement to drop it from 4Hz to 3Hz is easier than engineering to add another barrel, for example.ajax87 wrote: ↑Fri Jul 29, 2022 2:54 pmMostly, yes. But I think a higher PR is also a sign of higher quality materials and better engineering used in the design and build of the movement, indicating better reliability and longevity.jkbarnes wrote: ↑Fri Jul 29, 2022 2:47 pmInteresting, and that makes a lot of sense in terms of the practicality of a power reserve. I wonder if it’s become a marketing thing then, kinda like the pixel wars with camera sensors? Bigger number for the sake of bigger number.rkovars wrote: ↑Fri Jul 29, 2022 2:44 pm I was curious about this too. I checked the datasheet when this thread was originally posted and it is a minimum. There was a pretty good discussion I heard recently about PR and whether or not 56 is useful. Pretty much anything over 24 gets the job done for a daily and 56 might not get you through a weekend. An interesting discussion to be sure.
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Re: Not getting 56 hours with C63 GMT
Another Hodinkee Deep Dive on frequency. Definitely worth the time to read.thomcat00 wrote: ↑Fri Jul 29, 2022 5:56 pmA higher PR can also be achieved by reducing the movement frequency, without impacting accuracy of a basic three-hander. Affecting the movement to drop it from 4Hz to 3Hz is easier than engineering to add another barrel, for example.
Life is not a matter of holding good cards, but sometimes, playing a poor hand well.
Jack London
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Re: Not getting 56 hours with C63 GMT
The power reserve of a watch is important to me. Yes I have a few that only have a PR of 38hrs, but they were bought knowing they would only be worn occasionally.jkbarnes wrote: ↑Fri Jul 29, 2022 2:47 pmInteresting, and that makes a lot of sense in terms of the practicality of a power reserve. I wonder if it’s become a marketing thing then, kinda like the pixel wars with camera sensors? Bigger number for the sake of bigger number.rkovars wrote: ↑Fri Jul 29, 2022 2:44 pm I was curious about this too. I checked the datasheet when this thread was originally posted and it is a minimum. There was a pretty good discussion I heard recently about PR and whether or not 56 is useful. Pretty much anything over 24 gets the job done for a daily and 56 might not get you through a weekend. An interesting discussion to be sure.
I tend to have 3 watches set and running at any given time. These will be the main watches that I wear during a week, maybe longer. Yes I may pick up another watch in that period and wear it for a day, before letting it run down, as I know I won’t pick it up again for another month or so.
It’s easy enough to keep three set and running, if they have a decent power reserve. I think I have probably worn seven watches over the past couple of weeks. The three main ones have PR of 58, 60 and 72 hours. Easy enough to pick up, put down as I wish, without any stopping and whilst keeping a good level of accuracy (I don’t use watch winders). The three are all still running and when I checked this morning the timing ranged from +1s-+8s cumulative over the past weeks.
Neil
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Re: Not getting 56 hours with C63 GMT
2nd attempt for me got 50 hours. Maybe I didn’t wind it fully, it is difficult to tell. But that’s fine with me, plus I’m sick of not wearing it
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Alex
C5A Mk1|C65 316L LE|C63 36mm, GMT, Elite, 2023ish FLE|C1 Moonglow|Omega Seamaster DeVille|Speedmaster Racing|MoonSwatch Mercury|RZE Endeavor|Tudor BB58 925
C5A Mk1|C65 316L LE|C63 36mm, GMT, Elite, 2023ish FLE|C1 Moonglow|Omega Seamaster DeVille|Speedmaster Racing|MoonSwatch Mercury|RZE Endeavor|Tudor BB58 925