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Old 15 June 2018, 07:31 AM   #1
huck55
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Explorer gaining 5-7 sec per month...

just purchased a pre-owned (2016) Explorer II 216570 Polar a couple of months ago from a TS on TRF and I wear it pretty much everyday. Very happy with my first purchase.

I've noticed it gained about 5-7 seconds over the course of 30 days.

Is that a big deal?
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Old 15 June 2018, 07:34 AM   #2
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Quote:
Originally Posted by huck55 View Post
just purchased a pre-owned (2016) Explorer II 216570 Polar a couple of months ago from a TS on TRG and I wear it pretty much everyday. Very happy with my first purchase.

I've noticed it gained about 5-7 seconds over the course of 30 days.

Is that a big deal?

Pretty darn accurate! Consider yourself fortunate.
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Old 15 June 2018, 07:36 AM   #3
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Quote:
Originally Posted by huck55 View Post
just purchased a pre-owned (2016) Explorer II 216570 Polar a couple of months ago from a TS on TRG and I wear it pretty much everyday. Very happy with my first purchase.

I've noticed it gained about 5-7 seconds over the course of 30 days.

Is that a big deal?
Nope. Enjoy!
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Old 15 June 2018, 07:41 AM   #4
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Originally Posted by huck55 View Post
I've noticed it gained about 5-7 seconds over the course of 30 days.

Is that a big deal?
60 x 60 x 24 x 30 = 2,592,000 seconds per month
(5 + 7) / 2 = 6 seconds of gain on average
6 / 2,592,000 = 0.0000023% or 2.3 millionths of a percent

That's a small deal!
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Old 15 June 2018, 08:21 AM   #5
dmash
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Are you being sarcastic because that’s so accurate?
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Old 15 June 2018, 08:36 AM   #6
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Are you being sarcastic because that’s so accurate?
Haha, yeah. 5-7 out of 30 sounds big. 6 out of 2,592,000 puts it in perspective.

That's pretty damn good for a mechanical watch.
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Old 15 June 2018, 08:44 AM   #7
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Yep, that's a big deal. That's about as accurate as you could hope for in an automatic!
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Old 15 June 2018, 08:46 AM   #8
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That's amazingly good! I have the same watch in black, 2018 and am getting +2/day out of the gate. I'm very happy with that. What you are getting is FANTASTIC!!! Enjoy!!! I do!!!
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Old 15 June 2018, 08:47 AM   #9
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Quote:
Originally Posted by huck55 View Post
just purchased a pre-owned (2016) Explorer II 216570 Polar a couple of months ago from a TS on TRF and I wear it pretty much everyday. Very happy with my first purchase.

I've noticed it gained about 5-7 seconds over the course of 30 days.

Is that a big deal?
Were you expecting it to gain more?
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Old 15 June 2018, 09:08 AM   #10
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Yes, it is a big deal. The deal is that you have a great watch, better than average.
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Old 15 June 2018, 09:10 AM   #11
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Your watch is amazingly accurate.
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Old 15 June 2018, 09:12 AM   #12
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This is better than quartz.
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Old 15 June 2018, 09:12 AM   #13
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I’m pretty sure about 99.9% of people here would be happy with that
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Old 15 June 2018, 09:38 AM   #14
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I’m pretty sure about 99.9% of people here would be happy with that
If you want, I can run the numbers on that as well. It's probably around 204,212 out of 204,213 or 99.99951%.

It's darned close to 100%.
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Old 15 June 2018, 09:40 AM   #15
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... the Contrôle Officiel Suisse des Chronomtres (COSC) standard deviation rate of -4 to +6 seconds within a 24 hour day, tested over a ten day period of chronometer testing, in five positions and at three temperatures. Watches that are within -4 to +6 seconds deviation in a 24 hour period are awarded Official Chronometer Certification by COSC and the movement is engraved with a chronometer serial number. Rolex has a self-imposed stricter standard of -1 to +5 seconds per day and hence the designation, "Superlative Chronometer Officially Certified" on the dial of any certified Rolex watch

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Old 15 June 2018, 09:44 AM   #16
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Lol it's outside the guarantee of + or - .0005 secs per month

The guarantee now is + or - 2 secs/day

Though at 5-7 secs a month it just may be magnetized
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Old 15 June 2018, 11:37 AM   #17
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Hey guys, I found a BLRO at my AD for retail. Is that a big deal?
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Old 15 June 2018, 11:52 AM   #18
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Check to see if magnetized
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Old 15 June 2018, 12:00 PM   #19
dubins930
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that beats my explorer 1 by far haha....
but not my Nomos club
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Old 15 June 2018, 12:30 PM   #20
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You’ve acquired a very accurate used watch, congrats...nothing to worry about.
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Old 15 June 2018, 05:12 PM   #21
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Quote:
Originally Posted by Bfd70 View Post
... the Contrôle Officiel Suisse des Chronomtres (COSC) standard deviation rate of -4 to +6 seconds within a 24 hour day, tested over a ten day period of chronometer testing, in five positions and at three temperatures. Watches that are within -4 to +6 seconds deviation in a 24 hour period are awarded Official Chronometer Certification by COSC and the movement is engraved with a chronometer serial number. Rolex has a self-imposed stricter standard of -1 to +5 seconds per day and hence the designation, "Superlative Chronometer Officially Certified" on the dial of any certified Rolex watch
That's just a internet myth about the -1+5 second standard,and don't read too much in the the wording "Superlative" in front of the official designation of Chronometer.As today its merely a Rolex marketing ploy to give it a more distinguished sound to the chronometer status of their products. Any words added before or after the official designation of Chronometer are merely purely marketing,likewise the wording Certified Chronometer,is a redundant phrase word, since getting the Chronometer status is the certification,but the certification is only at the time of testing the bare un-cased movement.And all Swiss chronometers of the same size as Rolex movements are tested to exactly the same standard as any other certified movement of the same size as Rolex.And today most mechanical movements made with some very careful regulation could meet or pass the COSC spec today.
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Old 15 June 2018, 05:22 PM   #22
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Quote:
Originally Posted by Bfd70 View Post
... the Contrôle Officiel Suisse des Chronomtres (COSC) standard deviation rate of -4 to +6 seconds within a 24 hour day, tested over a ten day period of chronometer testing, in five positions and at three temperatures. Watches that are within -4 to +6 seconds deviation in a 24 hour period are awarded Official Chronometer Certification by COSC and the movement is engraved with a chronometer serial number. Rolex has a self-imposed stricter standard of -1 to +5 seconds per day and hence the designation, "Superlative Chronometer Officially Certified" on the dial of any certified Rolex watch
The word "superlative" was first added to Rolex dials about 60 years ago. As Peter says, it's just marketing jargon.
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Old 15 June 2018, 06:06 PM   #23
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Let’s just say I paid probably 5-6x more for my brand new DD, and your watch is more than twice as accurate as mine. I think you should be thrilled that your watch is so accurate.
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Old 15 June 2018, 06:31 PM   #24
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The word "superlative" was first added to Rolex dials about 60 years ago. As Peter says, it's just marketing jargon.
Have to agree the COSC has only been around since 1973 Now before the Swiss COSC was started in 1973 they used to have Observatory testing competitions and they were to much higher standard than today's Swiss COSC. Now during the entire 23 years of testing these Observatory tests,just 5093 wristwatches were submitted for certification, and only 3253 were passed, about 64%, today around 96% pass the COSC test first time a big difference now truth be told today with careful regulation most any movement could pass todays test.Back in the 1960-70s just a few manufacturers participated, and only Omega and Patek did so every year. The other brands. were: Rolex, Zenith, Longines, Movado, Vacheron & Constantin, Ulysse Nardin, Cyma and Favre-Leuba, along with numerous independent professional watchmakers.

That was until the Seiko Grand come on the scene and started to wipe the floor with the Swiss mechanical watch industry.Now in those days only 2 brands in the + 23 years of the competitions submitted movements of only serial production for retail sale(Seiko and GP).All other movements were specially made movements just for the competition test and not then for retail sale.

Now Seiko first entered the competition,with other watches from all over the world,including most of the Swiss high end brands.But then for a much higher standard than todays COSC,the Astronomical Observatory Authorisation Chronometer Standard (+/- 2/3 seconds/day) Out of many watches submitted only two passed this test a Seiko Grand just a production model, and Giraud Peregaux this time a specially build for the test model.And in the late 1960s there were only two companies, who could sell watches, passed astronomical observatory authorisation Chronometer in those days,just Seiko and Giraud Peregaux.As the Japanese had dominated the tests in the very late 1960s and the two preceding events the early 1970s.And in 1972 many of Swiss watch manufacturers demanded the end of the observatory competitions,and it was ended in 1973,now thats when the Swiss COSC was founded but run by the Swiss for the Swiss brands only I wonder why.
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All posts are my own opinion and my opinion only.

"The clock of life is wound but once, and no man has the power to tell just when the hands will stop. Now is the only time you actually own the time, Place no faith in time, for the clock may soon be still for ever."
Good Judgement comes from experience,experience comes from Bad Judgement,.Buy quality, cry once; buy cheap, cry again and again.

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Old 15 June 2018, 06:51 PM   #25
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Quote:
Originally Posted by huck55 View Post
just purchased a pre-owned (2016) Explorer II 216570 Polar a couple of months ago from a TS on TRF and I wear it pretty much everyday. Very happy with my first purchase.

I've noticed it gained about 5-7 seconds over the course of 30 days.

Is that a big deal?
Yes it is a big deal it shows you watch is finely regulated and matched to your wearing habits.
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All posts are my own opinion and my opinion only.

"The clock of life is wound but once, and no man has the power to tell just when the hands will stop. Now is the only time you actually own the time, Place no faith in time, for the clock may soon be still for ever."
Good Judgement comes from experience,experience comes from Bad Judgement,.Buy quality, cry once; buy cheap, cry again and again.

www.mc0yad.com

Second in command CEO and left handed watch winder
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Old 15 June 2018, 07:00 PM   #26
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Originally Posted by padi56 View Post
Have to agree the COSC has only been around since 1973 Now before the Swiss COSC was started in 1973 they used to have Observatory testing competitions and they were to much higher standard than today's Swiss COSC. Now during the entire 23 years of testing these Observatory tests,just 5093 wristwatches were submitted for certification, and only 3253 were passed, about 64%, today around 96% pass the COSC test first time a big difference now truth be told today with careful regulation most any movement could pass todays test.Back in the 1960-70s just a few manufacturers participated, and only Omega and Patek did so every year. The other brands. were: Rolex, Zenith, Longines, Movado, Vacheron & Constantin, Ulysse Nardin, Cyma and Favre-Leuba, along with numerous independent professional watchmakers.

That was until the Seiko Grand come on the scene and started to wipe the floor with the Swiss mechanical watch industry.Now in those days only 2 brands in the + 23 years of the competitions submitted movements of only serial production for retail sale(Seiko and GP).All other movements were specially made movements just for the competition test and not then for retail sale.

Now Seiko first entered the competition,with other watches from all over the world,including most of the Swiss high end brands.But then for a much higher standard than todays COSC,the Astronomical Observatory Authorisation Chronometer Standard (+/- 2/3 seconds/day) Out of many watches submitted only two passed this test a Seiko Grand just a production model, and Giraud Peregaux this time a specially build for the test model.And in the late 1960s there were only two companies, who could sell watches, passed astronomical observatory authorisation Chronometer in those days,just Seiko and Giraud Peregaux.As the Japanese had dominated the tests in the very late 1960s and the two preceding events the early 1970s.And in 1972 many of Swiss watch manufacturers demanded the end of the observatory competitions,and it was ended in 1973,now thats when the Swiss COSC was founded but run by the Swiss for the Swiss brands only I wonder why.
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Absolutely. Seiko made incredible advances thru the 1960s and early 70s with their mecahnical movements. They and GP were the first to put out a 36,000 bph movement, too. It's ironic that their quartz movements put a stop to their supremacy in the mechanical field, when Grand Seiko and King Seiko were shut down.

This 1971 King Seiko chrono still keeps near perfect time.
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Old 15 June 2018, 07:17 PM   #27
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Does anyone else think the OP is trolling us?
He is asking about 5-7 seconds over 1 month. Really???
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Old 15 June 2018, 07:20 PM   #28
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My AP gain that much in a day
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