How's that for accuracy? - mob.watchprosite.com

How's that for accuracy?
Jul 19 2008,08:32 AM

Looks like the new Valgranges in my C1 is effectively quite powerful and accurate!

From my date of purchase on May 13th to June 16th, it gained 24 seconds, compared to Atomic clock.

And from June 16th to today, it only gained another marginal 30 seconds!!

Compared to my IWC Rattrapante (customized Valjoux 7750), it is a nice improvement since it would gain only a respectable average of one minute per month.

Being quite active, it also tells me that this new caliber is pretty solid and, as well, nicely protected by the case of my C1. Appears to me that Concord must have done something right with their C1s.

Regards,

Yves

Impressive, Yves!
Jul 19 2008,10:58 AM

Well, maybe no as accurate as an atomic clock, which gains or looses millisecond in a month, but more accurate than many prestigious watches, certainly!
Wow!
Impressive, indeed!
Thanks for sharing!
Nicolas

Nicholas missed out the word 'VERY'. thats Very Impressive.
Jul 19 2008,12:19 PM

for any watch to lose of gain 1/2 sec a day is superb. in fact, in my experience its pretty unheard of even in the world of certified chronometers. i'm assuming the C1 is a chronometer. bearing in mind its a chrono as well i'd be interested to know if the chrono was used during this period? if not it would be an interesting experiment to try it and use the chrono for perhaps 1 hour a day to see if it affects the accuracy.

the only watches i own that are anywhere near that are my vintage Grand Seiko's. my 1964 Kind Seiko shows no difference on a daily basis compared to speaking clock, but i should do a longer test on it like you have. i just never wear it for more than a couple of days.

the best thing about this is that the watch is also a superb looking piece so you have everything in one package.

as you have said, it sounds like concorde have come up with a winner.

Graham

Yep, Graham, my English is very poor!
Jul 19 2008,14:05 PM

LOL
Best from Borat!

far better than my french...
Jul 19 2008,14:09 PM

far better than my french mon ami :)

Graham

Ahh Borat!
Jul 20 2008,15:47 PM

Your english would improve greatly through a visit to these elysian shores
a

Answer to use of Chrono function
Jul 21 2008,07:11 AM

Thanks for the good words Graham.

Indeed, I regularly use my chrono function while doing my daily workout. I need to respect a pause between each exercices therefore my chrono is a definite asset. On average the chrono function will be activated in periods of 90 seconds, with a daily repetition of about 8 to 10 times.

Kind regards,

Yves

Yves, in that case it...
Jul 21 2008,10:48 AM

Yves, in that case it is very very impressive. when
you bear in mind that it took Omega 4 years to release a cosc auto chrono after
the first auto chrono in 1969. (whether the timing was set to coincide with
their 125th anniversary is something we'll never know). we also dont know if it
stayed within limits with chrono in use, however, if you use your chrono several
times a day and it stays at 1/2 sec a day that is indeed superb. i know accuracy
is not the be all and end all, but it is a good indication of quality.

sounds to me like a great watch.

best Graham

Is that accuracy typical for that movement? (nt)
Jul 20 2008,05:55 AM

May run in the family...
Jul 21 2008,18:28 PM

It is hard to assess since the Valgranges is a quite new movement. But it has good genes since the Valjoux 7750 has proven itself to be not bad at all over time. Looking at the specs of both calibers, they don't seem to be that much different except that the Valgranges is more powerful.

In the end, we must always remember that we are dealing with imperfect mechanics and sometimes one will just work better than others (or the contrary).

In the past, I had a Tag Serie 6000 COSC (ETA 2892) loosing almost a minute per week. Today, my UN Maxi Marine Diver COSC (ETA 2892) looses only a little more than a minute per month.

Kind regards,

Yves

More or less what Yves did say already
Jul 22 2008,00:32 AM

Hard to associate accuracy and a specific movement. For sure, some movement have better caracteristics than others to reach the chronometer's criterias, however, there is still a huge gap that is closely linked to the time and efforts that will be spent to enhance it. If the guy who will tune the accuracy doesn't have much time -because of the policy of the brand- then you better be lucky so that he'll find the perfect position "at once". So in this case you might find one that is very accurate, and another one that is not so much. Then, if the movement is good quality, then, the variation will be constant : constantly very accurate, or constantly late (or early).
For the very same movement, with the very same level of quality (4 different levels in ETA from memory) you can still tune the quality, and enhance it. An ETA movement out of the chain still can be improved by adjusting the jewels, the pallet stones, the finishing of the pivots... you can even consider changing some parts like the escapement wheel that is not allways perfectly round for instance... and so on and so on.

So, what is interesting in this case, in my opinion, is that, as per the request of another purist : the performance is kept the same while the chronograph is activated. This complication uses to decrease the amplitude of the balance wheel and therefore affect the accuracy. Keeping it constant is probably a sign of power as you mention and efficiency in using it.

Thank you for this report !

Christian.



By: Yves007 (registered) PM Posts: 62	How's that for accuracy? Jul 19 2008,08:32 AM Looks like the new Valgranges in my C1 is effectively quite powerful and accurate! From my date of purchase on May 13th to June 16th, it gained 24 seconds, compared to Atomic clock. And from June 16th to today, it only gained another marginal 30 seconds!! Compared to my IWC Rattrapante (customized Valjoux 7750), it is a nice improvement since it would gain only a respectable average of one minute per month. Being quite active, it also tells me that this new caliber is pretty solid and, as well, nicely protected by the case of my C1. Appears to me that Concord must have done something right with their C1s. Regards, Yves Respond to this post \|



By: amanico (registered) PM Posts: 7531	Impressive, Yves! Jul 19 2008,10:58 AM Well, maybe no as accurate as an atomic clock, which gains or looses millisecond in a month, but more accurate than many prestigious watches, certainly! Wow! Impressive, indeed! Thanks for sharing! Nicolas Respond to this post \|



By: gmhutton (registered) PM Posts: 1129	Nicholas missed out the word 'VERY'. thats Very Impressive. Jul 19 2008,12:19 PM for any watch to lose of gain 1/2 sec a day is superb. in fact, in my experience its pretty unheard of even in the world of certified chronometers. i'm assuming the C1 is a chronometer. bearing in mind its a chrono as well i'd be interested to know if the chrono was used during this period? if not it would be an interesting experiment to try it and use the chrono for perhaps 1 hour a day to see if it affects the accuracy. the only watches i own that are anywhere near that are my vintage Grand Seiko's. my 1964 Kind Seiko shows no difference on a daily basis compared to speaking clock, but i should do a longer test on it like you have. i just never wear it for more than a couple of days. the best thing about this is that the watch is also a superb looking piece so you have everything in one package. as you have said, it sounds like concorde have come up with a winner. Graham Respond to this post \|



By: aaronm (registered) PM Posts: 501	Ahh Borat! Jul 20 2008,15:47 PM Your english would improve greatly through a visit to these elysian shores a Respond to this post \|



By: Ronald Held (registered) PM Posts: 1664	Is that accuracy typical for that movement? (nt) Jul 20 2008,05:55 AM NT Respond to this post \|



By: Steyr (registered) PM Posts: 37	More or less what Yves did say already Jul 22 2008,00:32 AM Hard to associate accuracy and a specific movement. For sure, some movement have better caracteristics than others to reach the chronometer's criterias, however, there is still a huge gap that is closely linked to the time and efforts that will be spent to enhance it. If the guy who will tune the accuracy doesn't have much time -because of the policy of the brand- then you better be lucky so that he'll find the perfect position "at once". So in this case you might find one that is very accurate, and another one that is not so much. Then, if the movement is good quality, then, the variation will be constant : constantly very accurate, or constantly late (or early). For the very same movement, with the very same level of quality (4 different levels in ETA from memory) you can still tune the quality, and enhance it. An ETA movement out of the chain still can be improved by adjusting the jewels, the pallet stones, the finishing of the pivots... you can even consider changing some parts like the escapement wheel that is not allways perfectly round for instance... and so on and so on. So, what is interesting in this case, in my opinion, is that, as per the request of another purist : the performance is kept the same while the chronograph is activated. This complication uses to decrease the amplitude of the balance wheel and therefore affect the accuracy. Keeping it constant is probably a sign of power as you mention and efficiency in using it. Thank you for this report ! Christian. Respond to this post \|

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