Not getting 56 hours with C63 GMT

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Re: Not getting 56 hours with C63 GMT

Post by Bahnstormer_vRS »

Bahnstormer_vRS wrote: Thu Jul 28, 2022 11:10 pm I'm up and running with the 56 hours Power Reserve test on my C60 Abyss GMT V_2 with an SW330-2 inside.

Having put it on around 06:30 hrs yesterday morning and worn it through to 20:00hrs this evening, bar overnight in bed, I reckon it should be fully charged.

. . . . . .

Now, into Phase 2, to run it down and establish the Power Reserve.

By my reckoning 56 hours will take me through to 04:00 hrs on Sunday morning. We'll see and here goes.

Guy
Nearly made it. :) :)

The watch initially stopped at 23:30hrs Saturday night i.e. after 51.5 hrs.

A useful feature of doing this test is the watch being a GMT, as one can tell for how the GMT hand has been set whether it is showing am or pm.

Having picked it up, looked at it, then put it down again it started running again; this is without any discernable attempt to wind it. I have an unproven theory that with any watch it will stop when it meets a point of resistance, somewhere in the movement. By picking it up, looking at it and then putting it down, it will 'bump' the movement into action until the next time that it meets a point of resistance, and then stop.

Thus happened with the watch showing 02:00hrs Sunday morning i. e. after 54 hrs.

I've picked it up, looked at it and put it down again and its has, again, started running (and still is). We might yet get to 56 hrs! :wink: :wink:

Final update to follow tomorrow.


Guy
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Re: Not getting 56 hours with C63 GMT

Post by Bident »

Greetings from Spain, fellow inmates! I do appreciate all the efforts testing the SW330-2 for the power reserve. It seems those that have been tested in this thread have not achieved the 56 hours stated, and it appears stated observations are closer to 50 hours or so. Having learned this, I am unlikely to return my C63 GMT for inspection and repair since it seems my watch is consistent with others regarding the PR, and perhaps the new movement doesn’t quite live up to its billing due to initial production kinks. I’ll most likely inform CW customer service of our findings here and possibly Mike France.

Thanks again to all and cheers from Barcelona.
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Re: Not getting 56 hours with C63 GMT

Post by rkovars »

nbg wrote: Fri Jul 29, 2022 6:24 pm 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.

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
This is interesting. I can conceptually understand what you are talking about here but I can't relate. Not once in the 40 or so years I have worn watches have I passed on wearing a certain watch because it was stopped. Not once. Well, that isn't exactly true, I have not taken my Apple watch on a few runs because it was dead but I'm not sure that counts in this context :lol: .
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Re: Not getting 56 hours with C63 GMT

Post by johncolescarr »

Just tested my new to me V2 abyss GMT. I got 52hrs. I’m happy with this.
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Re: Not getting 56 hours with C63 GMT

Post by Noush »

I wear my Sealander GMT every Thursday 5am until 4pm. It's a thing :)
So it runs down from fully charged every week. It stops at the same time Saturday night 10pm every week. 54 hours without fail.
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Re: Not getting 56 hours with C63 GMT

Post by Bident »

I find it curious that nobody on this thread ever achieved the stated 56 hours.

Before I left this week to travel, I noticed my C63 GMT’s power reserve seemed to be getting worse. It had been around 48 hours and now is about 45 hours. If it continues to slip I will most likely send it in for repairs.
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Re: Not getting 56 hours with C63 GMT

Post by MiniMpi »

Thread resurrection!

I wanted to see if my C65 GMT Worldtimer has the newer movement or not so I set it at 21:45 on the 7th and fully wound it and put in the box.
Checked it there , it stopped at 23:45 last night, the 9th.
Going by this it lasted 50 hours.

So the SW330-1 has a power reserve of 42 hours so well past that and just down on the 56 hour power reserve of the SW330-2.

Would I therefore be correct in assuming it's the SW330-2 so I have ?
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Re: Not getting 56 hours with C63 GMT

Post by Bident »

MiniMpi wrote: Mon Oct 10, 2022 5:35 am Thread resurrection!

I wanted to see if my C65 GMT Worldtimer has the newer movement or not so I set it at 21:45 on the 7th and fully wound it and put in the box.
Checked it there , it stopped at 23:45 last night, the 9th.
Going by this it lasted 50 hours.

So the SW330-1 has a power reserve of 42 hours so well past that and just down on the 56 hour power reserve of the SW330-2.

Would I therefore be correct in assuming it's the SW330-2 so I have ?
That's a good question, Ferg. I have two of the older ETA 2893s and one equivalent SW330-1, all of which run for 48 to 50 hours despite having a stated 42 hour power reserve. I of course have the SW330-2 in my C63 GMT that would only last 41-48 hours (the irony doesn't escape me with the flip flop between stated and actual power reserves), so it's pretty hard to tell without opening up the case back and looking at the engraving on the movement near the balance wheel. I read on line that some people who have the SW330-2 (in non CW watches) observe 60+ hours of power reserve even though it says 56 hours.

CW has had my watch since September 1 with an estimated turn around time of 6 to 8 weeks. That equates to October 13 to October 27, so at some point later this month I should be able to report back on the power reserve being 56 hours or longer, or if it's simply unchanged (which would be disappointing given my long wait). It is quite strange though that nobody on this thread reached the stated 56 hours. I wonder if a batch of the SW330-2s that CW received had a mistaken barrel spring from the older movement.
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Re: Not getting 56 hours with C63 GMT

Post by Bahnstormer_vRS »

^^^^ The question, Ferg, seems to be; 'Have I got an overperforming SW330 or an underperforming SW330-2?'

Firstly, I wrote this earlier in the thread;-
Bahnstormer_vRS wrote: Sun Jul 31, 2022 10:24 pm Nearly made it. :) :)

The watch initially stopped at 23:30hrs Saturday night i.e. after 51.5 hrs.

A useful feature of doing this test is the watch being a GMT, as one can tell for how the GMT hand has been set whether it is showing am or pm.

Having picked it up, looked at it, then put it down again it started running again; this is without any discernable attempt to wind it. I have an unproven theory that with any watch it will stop when it meets a point of resistance, somewhere in the movement. By picking it up, looking at it and then putting it down, it will 'bump' the movement into action until the next time that it meets a point of resistance, and then stop.

Thus happened with the watch showing 02:00hrs Sunday morning i. e. after 54 hrs.

I've picked it up, looked at it and put it down again and its has, again, started running (and still is). We might yet get to 56 hrs! :wink: :wink:
Secondly, you need to go to the feel and precision of the movement, especially, when adjusting the date and/or GMT hand, where the SW330-2 is notably better in both respects.

It's hard to quantify but there is also a note in the CWArchive for the C65 WorldTimer which states;-

"How to tell which Sellita movement you have: the easy way is by adjusting the GMT hand in second crown position:
On the SW330-1 version, the GMT hand will move one position per revolution of the crown
On the SW330-2 version, the GMT hand will move 2 positions per revolution of the crown."


Having set my C65 GMT MCM2 this morning, which has the SW330-2, I can atest this is correct.

Guy



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Re: Not getting 56 hours with C63 GMT

Post by chrisedwards »

If it makes any odds I got nowhere near the claimed 56hrs when I had my C63 GMT (which was one of the first they ever sent out).
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Re: Not getting 56 hours with C63 GMT

Post by JAFO »

@Bahnstormer_vRS

Guy - I expect you are correct about a friction "sticking point" when a watch is near the end of its PR. Something has to bring it to a stop, as it would be perpetual motion if it didn't.
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Re: Not getting 56 hours with C63 GMT

Post by rkovars »

Bahnstormer_vRS wrote: Mon Oct 10, 2022 9:01 am
It's hard to quantify but there is also a note in the CWArchive for the C65 WorldTimer which states;-

"How to tell which Sellita movement you have: the easy way is by adjusting the GMT hand in second crown position:
On the SW330-1 version, the GMT hand will move one position per revolution of the crown
On the SW330-2 version, the GMT hand will move 2 positions per revolution of the crown."


Having set my C65 GMT MCM2 this morning, which has the SW330-2, I can atest this is correct.

Guy



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That test isn't hard and fast as the mod can be made to the SW330-1 (per data sheet). I wonder if we are in fact seeing some of these early watches with the mod to the GMT hand but not the new barrel. The longer power reserve requires a new barrel with a thinner wall (a trick from Rolex) that will accommodate a larger spring. I saw remarks of the new barrel part numbers being released in December of 2020. Not a great time for getting quick penetration through the supply chain.
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Re: Not getting 56 hours with C63 GMT

Post by albionphoto »

If power reserve is a specification then it should have a tolerance. I don't know what that tolerance is but I would be surprised it it was more than +/- 10%. It does seem that a running in period is required though.
If the longer power reserve is a function of new version of the SW330 then the question is, "Are CW using the new version?" I seem to recall that they made a "thing" of being one of, if not the, first customer of the newer version. I just can't remember which watch this applied to. There may be older versions of the movement available in the supply chain (at distributors, for example) but I thought that CW got their movements direct from Selitta. I doubt that Selitta are still making two versions as they will prefer a simpler supply chain with as few SKUs (variants) as possible.
I would dearly love to know the specification and tolerance on power reserve but it does seem that the new version may not be fully achieving 56 hours. I find Guy's test intriguing in this regard.
CW certainly have a power reserve tolerance for the SH21. A long time ago I was told that a power reserve of 118 hours was within tolerance for this movement. I suspect there's a tolerance for the SW330 as well. I'm just not sure if this is worth returning the watch for though.
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Re: Not getting 56 hours with C63 GMT

Post by rkovars »

albionphoto wrote: Fri Oct 14, 2022 8:03 pm If power reserve is a specification then it should have a tolerance. I don't know what that tolerance is but I would be surprised it it was more than +/- 10%. It does seem that a running in period is required though.
If the longer power reserve is a function of new version of the SW330 then the question is, "Are CW using the new version?" I seem to recall that they made a "thing" of being one of, if not the, first customer of the newer version. I just can't remember which watch this applied to. There may be older versions of the movement available in the supply chain (at distributors, for example) but I thought that CW got their movements direct from Selitta. I doubt that Selitta are still making two versions as they will prefer a simpler supply chain with as few SKUs (variants) as possible.
I would dearly love to know the specification and tolerance on power reserve but it does seem that the new version may not be fully achieving 56 hours. I find Guy's test intriguing in this regard.
CW certainly have a power reserve tolerance for the SH21. A long time ago I was told that a power reserve of 118 hours was within tolerance for this movement. I suspect there's a tolerance for the SW330 as well. I'm just not sure if this is worth returning the watch for though.
Per the data sheet the min is 50 hours. Typical 56.
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Re: Not getting 56 hours with C63 GMT

Post by Bident »

rkovars wrote: Fri Oct 14, 2022 9:26 pm
albionphoto wrote: Fri Oct 14, 2022 8:03 pm If power reserve is a specification then it should have a tolerance. I don't know what that tolerance is but I would be surprised it it was more than +/- 10%. It does seem that a running in period is required though.
If the longer power reserve is a function of new version of the SW330 then the question is, "Are CW using the new version?" I seem to recall that they made a "thing" of being one of, if not the, first customer of the newer version. I just can't remember which watch this applied to. There may be older versions of the movement available in the supply chain (at distributors, for example) but I thought that CW got their movements direct from Selitta. I doubt that Selitta are still making two versions as they will prefer a simpler supply chain with as few SKUs (variants) as possible.
I would dearly love to know the specification and tolerance on power reserve but it does seem that the new version may not be fully achieving 56 hours. I find Guy's test intriguing in this regard.
CW certainly have a power reserve tolerance for the SH21. A long time ago I was told that a power reserve of 118 hours was within tolerance for this movement. I suspect there's a tolerance for the SW330 as well. I'm just not sure if this is worth returning the watch for though.
Per the data sheet the min is 50 hours. Typical 56.
I believe the watch that first received the SW330-2 was the C63 GMT.

I never once got 50 hours while I had my C63 GMT before sending it back for service. I also had a problem with the power reserve decreasing over time. I emailed CW this week (now being six weeks out from their receipt of my watch) and was told it would be eight weeks before I would get my watch back. Will update on this thread once I do receive it.
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