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ArcticMoose · 7 June 2011, 03:19 AM

I had a feeling that a few of my watches were acting a little flaky so I conducted this very unscientific investigation into the accuracy and power reserve of a handful of them.

I also included enough coins to guarantee authenticity of them all, and a Sleeptracker for reference. I set them all and spent the first five minutes getting them started and fully wound.

5 minutes

Everything looks fine, but obviously the Oris was let go a second too early, and the LV and YM about half a second.

11 hours

The PAM has fallen behind by two seconds. The Oris is already 13 seconds fast. The YM is two seconds fast. The LV is over six seconds fast.

23 hours

The PAM is almost five seconds slow. The Oris is almost 30 seconds fast, the LV 15 and the YM five.

31 hours

The PAM is more than six seconds slow. The Oris is 40 seconds fast, the LV is 20 and the YM five.

45 hours

The Oris has expired after 41.25 hours.

The LV is approaching 30 seconds fast. The YM has lost its previous pace and is now almost 10 seconds slow, falling behind the PAM.

The Explorer II and Sub-C are are still hardly deviating at all.

49 hours

The YM couldn't muster another date change and gave up after 46.35 hours.

The LV gave up after 47.25 hours. The Sub-C managed ten more minutes to 47.35, and the Explorer II wins (not counting the PAM) making it to 47.42 hours.

54 hours

The PAM is now ten seconds slow, but has another five days of power reserve. I want to wear it now, so this is the end of it.

I had a feeling the Explorer II and Sub-C were rock-solid, and this seems to confirm it.

I think the YM will be the first one off to service, but more due to the fact that winding and setting feels a bit "grindy" than the results of this messing about.

2th Dr · 7 June 2011, 03:24 AM

Fantastic! Thanks for sharing! I LOVE it!

dooder202 · 7 June 2011, 04:13 AM

Nice read!

Willgotthepower · 7 June 2011, 04:18 AM

Nice one! Thanks for the time and effort!

buke45 · 7 June 2011, 05:01 AM

Nice, Thanks for that !!!

rolexsweep · 7 June 2011, 05:16 AM

wow... great comparison and observation

Director EDTF · 7 June 2011, 05:20 AM

Thanks! Nice experiment

RRGHOST1 · 7 June 2011, 06:07 AM

I am glad the Sub TT came out well, as thats my next watch. Very interesting.

ArcticMoose · 7 June 2011, 06:25 AM

Thanks for the kind comments, everyone!

Quote:

Originally Posted by rolexplorer2

I am glad the Sub TT came out well, as thats my next watch. Very interesting.

Considering all the abuse I've put that one through, I'm surprised it is running at all, not to mention almost faultlessly. I never cease to be amazed at what these tiny bits of mechanics can do.

thepurze · 7 June 2011, 08:33 AM

You made my day after 6 different rolexs in the last year im back where i started with a explorer 2 i too have found satisfaction with the watch now please no more great reviews all youl do is kick the price up jack

nauticajoe · 7 June 2011, 06:14 AM

Interesting read. Well done.

George Ab · 7 June 2011, 08:42 AM

Keep in mind that for the mechanical watches the position of the watch will effect timing considerable due to the effect of gravity on the the balance wheel.

For a watch to be right on the mark. It should be about 1.5 seconds fast in the face up position and a delta (difference of greatest drift in six positions) within 5 to 10 seconds.

Just love the collection. The TT in blue, a YM, LV and Exp II polar, and I'm a PAM fan. Just really, really nice!

JUSTROLEXES · 7 June 2011, 08:51 AM

Well done David

broncophil · 7 June 2011, 09:51 AM

wow.. so does that mean the LV needs a calibration.. the reason why i ask is that my black milgauss that i once had was about a minute fast a week..

George Ab · 7 June 2011, 10:42 AM

Quote:

Originally Posted by broncophil

wow.. so does that mean the LV needs a calibration.. the reason why i ask is that my black milgauss that i once had was about a minute fast a week..

A minute a week = something is not right.

Take it to a watchmaker. He will perform the following: first he will degauss and then put it on a timing machine. From there he may have to regulate. Often just degaussing will alleviate the timing issue, then regulation; else, it is more serious.

I should read more carefully... operative word is "once" had.

broncophil · 7 June 2011, 12:32 PM

Quote:

Originally Posted by George Ab

A minute a week = something is not right.

Take it to a watchmaker. He will perform the following: first he will degauss and then put it on a timing machine. From there he may have to regulate. Often just degaussing will alleviate the timing issue, then regulation; else, it is more serious.

I should read more carefully... operative word is "once" had.

hahaha.. its cool.. very informative..thanks.

bkandj2000 · 7 June 2011, 12:42 PM

Great post!

Dan2010 · 7 June 2011, 01:13 PM

I love unscientific investigations.....................

hdrazor251 · 7 June 2011, 01:22 PM

Very interesting read. Thanks for posting.

Watchvirgin · 7 June 2011, 01:19 PM

Nice post!! Enjoyed it very much, thanks for sharing!!!

usbzoso · 7 June 2011, 01:22 PM

awesome!

threemonkeys · 7 June 2011, 02:36 PM

Very nice.

And just a year ago I could never imagine that I would read a post like this in a watch forum and thoroughly enjoy it. Glad I finally joined the darkside with all of you clowns.

rabbithole88 · 7 June 2011, 03:13 PM

Awesome work.

boogiebot · 7 June 2011, 04:02 PM

great post. im a person that would mess around with my watches just to see something like this.

Andad · 7 June 2011, 06:12 PM

Wow.

Puffy · 7 June 2011, 06:27 PM

cool stuff! can't go wrong with a bit of COSC testing action...

padi56 · 7 June 2011, 06:39 PM

Quote:

Originally Posted by Puffy

cool stuff! can't go wrong with a bit of COSC testing action...

Well not really when the bare uncased movements are tested at the COSC they are manual wound each day by a machine to maintain full power reserve.Plus they are tested in 5 different positions and temperatures.And as the power reserve depletes most movements would in general speed up.

rms · 7 June 2011, 07:34 PM

Quote:

Originally Posted by padi56

And as the power reserve depletes most movements would in general speed up.

Really? I believe you, but I would have have thought just the opposite. So they run faster just before they stop running?

padi56 · 8 June 2011, 01:50 AM

Quote:

Originally Posted by rms

Really? I believe you, but I would have have thought just the opposite. So they run faster just before they stop running?

As the main spring unwinds more,it has less torque on the drive-train, so the movement would run slightly faster due to the slight change in the amplitude.Now when wearing a watch with the main spring at full torque in most cases it will run constant beat rate, than if a watch is not worn.This is down mainly to the effect of gravity and your wrist movements having affects on the overall amplitude of the hairspring.This is why on a watch-winder a watch could be slightly different in its accuracy than when its on the wrist.

ArcticMoose · 8 June 2011, 02:37 AM

Quote:

Originally Posted by padi56

As the main spring unwinds more,it has less torque on the drive-train, so the movement would run slightly faster due to the slight change in the amplitude.Now when wearing a watch with the main spring at full torque in most cases it will run constant beat rate, than if a watch is not worn.This is down mainly to the effect of gravity and your wrist movements having affects on the overall amplitude of the hairspring.This is why on a watch-winder a watch could be slightly different in its accuracy than when its on the wrist.

Very interesting, thanks for the input.

Can you deduce anything about the YM that went from 5 seconds fast to 10 seconds slow in the few hours before the power reserve ran out?

Quote:

Originally Posted by jamesbondOO7

Excellent. Why the coins?

Why, to prove that all the watches are authentic, of course!

Quote:

Originally Posted by George Ab

Just love the collection. The TT in blue, a YM, LV and Exp II polar, and I'm a PAM fan. Just really, really nice!

Thanks!

7 June 2011, 03:19 AM	#1
ArcticMoose "TRF" Member Join Date: Oct 2009 Location: The Sea Posts: 1,894	Accuracy and Power Reserve - if OCD offends, please stay away :-) I had a feeling that a few of my watches were acting a little flaky so I conducted this very unscientific investigation into the accuracy and power reserve of a handful of them. I also included enough coins to guarantee authenticity of them all, and a Sleeptracker for reference. I set them all and spent the first five minutes getting them started and fully wound. 5 minutes Everything looks fine, but obviously the Oris was let go a second too early, and the LV and YM about half a second. 11 hours The PAM has fallen behind by two seconds. The Oris is already 13 seconds fast. The YM is two seconds fast. The LV is over six seconds fast. 23 hours The PAM is almost five seconds slow. The Oris is almost 30 seconds fast, the LV 15 and the YM five. 31 hours The PAM is more than six seconds slow. The Oris is 40 seconds fast, the LV is 20 and the YM five. 45 hours The Oris has expired after 41.25 hours. The LV is approaching 30 seconds fast. The YM has lost its previous pace and is now almost 10 seconds slow, falling behind the PAM. The Explorer II and Sub-C are are still hardly deviating at all. 49 hours The YM couldn't muster another date change and gave up after 46.35 hours. The LV gave up after 47.25 hours. The Sub-C managed ten more minutes to 47.35, and the Explorer II wins (not counting the PAM) making it to 47.42 hours. 54 hours The PAM is now ten seconds slow, but has another five days of power reserve. I want to wear it now, so this is the end of it. I had a feeling the Explorer II and Sub-C were rock-solid, and this seems to confirm it. I think the YM will be the first one off to service, but more due to the fact that winding and setting feels a bit "grindy" than the results of this messing about.

7 June 2011, 05:16 AM	#6
rolexsweep "TRF" Member Join Date: Jan 2011 Location: Australia Watch: RG DD40 Posts: 1,149	wow... great comparison and observation __________________ "Did you get that at retail?"

7 June 2011, 08:33 AM	#10
thepurze Member Join Date: Oct 2010 Location: CALIFORNIA Watch: rolex ex. sub gmt Posts: 61	Test You made my day after 6 different rolexs in the last year im back where i started with a explorer 2 i too have found satisfaction with the watch now please no more great reviews all youl do is kick the price up jack

7 June 2011, 08:42 AM	#12
George Ab "TRF" Member Join Date: Aug 2009 Real Name: George Location: Seattle Watch: One of Them Posts: 6,924	Keep in mind that for the mechanical watches the position of the watch will effect timing considerable due to the effect of gravity on the the balance wheel. For a watch to be right on the mark. It should be about 1.5 seconds fast in the face up position and a delta (difference of greatest drift in six positions) within 5 to 10 seconds. Just love the collection. The TT in blue, a YM, LV and Exp II polar, and I'm a PAM fan. Just really, really nice! __________________

7 June 2011, 08:51 AM	#13
JUSTROLEXES ⭐⭐⭐⭐⭐ 2024 SubLV41 Sponsor & Boutique Seller Join Date: Jul 2009 Real Name: Tony Geha Location: San Diego, CA Watch: Yacht-Master Posts: 51,120	Well done David __________________ Instagram @JustRolexes 2FA security active

7 June 2011, 03:24 AM	#2
2th Dr Banned Join Date: Jan 2009 Real Name: Mark-O! Location: Arlington, TX Watch: Rolex Posts: 12,714	Fantastic! Thanks for sharing! I LOVE it!

7 June 2011, 04:13 AM	#3
dooder202 Banned Join Date: Sep 2010 Real Name: Eric Location: US Watch: DateJust Posts: 1,468	Nice read!

7 June 2011, 04:18 AM	#4
Willgotthepower Banned Join Date: May 2011 Real Name: Will Location: London Watch: Polar explorer 2 Posts: 111	Nice one! Thanks for the time and effort!

7 June 2011, 05:01 AM	#5
buke45 Banned Join Date: Jun 2010 Real Name: Juan Location: Ponce, PR Watch: Your Butt Posts: 1,464	Nice, Thanks for that !!!

7 June 2011, 05:20 AM	#7
Director EDTF 2024 SubLV41 Pledge Member Join Date: May 2011 Real Name: Nelson Location: Central, NJ Posts: 2,466	Thanks! Nice experiment

7 June 2011, 06:07 AM	#8
RRGHOST1 "TRF" Member Join Date: Dec 2009 Real Name: luke standing Location: england Watch: Rolex TT SubC Blue Posts: 3,997	I am glad the Sub TT came out well, as thats my next watch. Very interesting.

7 June 2011, 06:14 AM	#11
nauticajoe "TRF" Member Join Date: Feb 2010 Real Name: Joe Location: PA Posts: 14,774	Interesting read. Well done.

7 June 2011, 09:51 AM	#14
broncophil "TRF" Member Join Date: Mar 2009 Location: Cali Posts: 423	wow.. so does that mean the LV needs a calibration.. the reason why i ask is that my black milgauss that i once had was about a minute fast a week.. __________________ subc nd * Daytona ceramic black * dj2 arabic * BLNR

7 June 2011, 12:42 PM	#17
bkandj2000 Member Join Date: Oct 2009 Real Name: B A Location: Oklahoma Watch: None specifically Posts: 651	Great post!

7 June 2011, 01:13 PM	#18
Dan2010 "TRF" Member Join Date: Apr 2010 Location: South Carolina Watch: Panerai 914 Posts: 6,540	I love unscientific investigations.....................

7 June 2011, 01:22 PM	#19
hdrazor251 "TRF" Member Join Date: Nov 2010 Real Name: Jeff Location: Arizona Watch: is recovered!! Posts: 4,255	Very interesting read. Thanks for posting. __________________ 16753 GMT Master, 16613 Bluesy, 16710 GMT Master II, 16570 Polar Explorer II-Stolen & Recovered!! Card Carrying Member of the Global Assoc. of Retro-Grouch-Curmudgeons

7 June 2011, 01:19 PM	#20
Watchvirgin Banned Join Date: Dec 2010 Real Name: Ash_Flash Location: Washington, DC Watch: AP Posts: 901	Nice post!! Enjoyed it very much, thanks for sharing!!!

7 June 2011, 01:22 PM	#21
usbzoso Banned Join Date: Apr 2011 Real Name: Stan Location: Dallas Watch: 16610/16600/16800 Posts: 1,231	awesome!

7 June 2011, 02:36 PM	#22
threemonkeys "TRF" Member Join Date: Feb 2011 Real Name: Craig Location: Seattle-ish, USA Watch: GMTIIc, AK, LVc Posts: 7,022	Very nice. And just a year ago I could never imagine that I would read a post like this in a watch forum and thoroughly enjoy it. Glad I finally joined the darkside with all of you clowns.

7 June 2011, 03:13 PM	#23
rabbithole88 "TRF" Member Join Date: May 2011 Location: SF & HK Watch: Submariner 116610v Posts: 258	Awesome work.

7 June 2011, 04:02 PM	#24
boogiebot "TRF" Member Join Date: Apr 2011 Location: canada Watch: me post! Posts: 3,804	great post. im a person that would mess around with my watches just to see something like this.

7 June 2011, 06:12 PM	#25
Andad 2024 SubLV41 Pledge Member Join Date: Nov 2006 Real Name: Eddie Location: Australia Watch: A few. Posts: 37,534	Wow. __________________ E

7 June 2011, 06:27 PM	#26
Puffy "TRF" Member Join Date: Oct 2009 Location: Here and there Posts: 12,485	cool stuff! can't go wrong with a bit of COSC testing action... __________________ Fine Quality is Long Remembered After the Pain of Spending Money is Forgotten

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