ROLEXROLEXROLEXROLEXROLEXROLEXROLEXROLEXROLEXROLEXROLEXROLEX

whw · 15 October 2008, 12:52 AM

I wrote about the accuracy of my GMT IIc here twice:
http://www.rolexforums.com/showthrea...t=53697&page=2

http://www.rolexforums.com/showthread.php?t=53927

Here is my final update and findings for those who are interested:

It has been exactly 7 full days since I set my watch, and I am glad to report that it is exactly 7 seconds slow ie. an average of 1 second slow per day. I am delighted with this result.

The key lesson I learnt (thanks to Art161) is to give your watch 40-50 360degree winds before you set the time on it the first time.

If I wear my watch for more than 12 hours, it tends to speed up about 1 second during that duration. And if I leave the watch unworn for 12 hours or so, it will tend to slow down for about 1.5-2 seconds.

All in all the average performance is -1 second per day!

Latrodectus · 15 October 2008, 12:54 AM

thank you for your great report and the links

golfball123 · 15 October 2008, 12:59 AM

thanks fr the info

bardm · 15 October 2008, 01:04 AM

I think that is a very good result

Quicksilver · 15 October 2008, 01:08 AM

Excellent result - congrats.

My Sub is still loosing 5 secs a day even with my fully winding it twice a day

pilfilr · 15 October 2008, 01:08 AM

Funny, I have the opposite results on 4/5 watches. My new DSSD runs slow... I will try your suggestions. All others are never fully wound and worn occasionally..all run a little fast. Cheers!

scottjal · 15 October 2008, 02:33 AM

Yes, 3186 is proving to be an excellent movement and mine is doing very well accuracy wise too. Usually around a second or less gain a day face up over night and I can correct that by laying crown down over night and slowing it down a bit to loose a second a day. Simply can't ask more of a mechanical movement.

Ivy League · 15 October 2008, 02:43 AM

hey Scott:

Several members are now claiming that laying a 3186 watch either crown up or down will not affect the accuracy to speed up/slow down your watch. Have you really detected a difference in this ?
Secondly, when does your date flip on the GMT IIc please ?
Just curious.........

padi56 · 15 October 2008, 02:56 AM

Now please stop worrying about your watch just wear and enjoy it for the next 30 years.

Art161 · 15 October 2008, 03:04 AM

Great result.

Glad I was able to be of some help.

Dr S · 15 October 2008, 05:12 AM

Best accuracy of any mechanical watch I have :)

scottjal · 15 October 2008, 05:43 AM

Quote:

Originally Posted by Ivy League

hey Scott:

Several members are now claiming that laying a 3186 watch either crown up or down will not affect the accuracy to speed up/slow down your watch. Have you really detected a difference in this ?
Secondly, when does your date flip on the GMT IIc please ?
Just curious.........

I'll back that up, the position for me is only good to change my watch about a second a day and that's it, not much at all. I'm just lucky that that little bit straddles +/-0. My 2006 16710 with the 3185 the position had a much greater influence and I think you could swing it nearly 4 or 5 seconds each way.

onkyo · 15 October 2008, 06:01 AM

Quote:

Originally Posted by padi56

Now please stop worrying about your watch just wear and enjoy it for the next 30 years.

losing 5 seconds per day over 30 years is no longer 30 years. It turns into 29 years, 364 days, and 8.8 hours (I think).

Erix · 16 October 2008, 03:38 AM

Quote:

Originally Posted by onkyo

losing 5 seconds per day over 30 years is no longer 30 years. It turns into 29 years, 364 days, and 8.8 hours (I think).

good one

padi56 · 16 October 2008, 03:54 AM

Quote:

Originally Posted by onkyo

losing 5 seconds per day over 30 years is no longer 30 years. It turns into 29 years, 364 days, and 8.8 hours (I think).

You definitely got more time on your hands.

eric23 · 16 October 2008, 04:31 AM

Sounds like a great watch!

15 October 2008, 12:52 AM	#1
whw "TRF" Member Join Date: May 2008 Location: Malaysia Posts: 26	GMT IIc - RANT (Final Update) I wrote about the accuracy of my GMT IIc here twice: http://www.rolexforums.com/showthrea...t=53697&page=2 http://www.rolexforums.com/showthread.php?t=53927 Here is my final update and findings for those who are interested: It has been exactly 7 full days since I set my watch, and I am glad to report that it is exactly 7 seconds slow ie. an average of 1 second slow per day. I am delighted with this result. The key lesson I learnt (thanks to Art161) is to give your watch 40-50 360degree winds before you set the time on it the first time. If I wear my watch for more than 12 hours, it tends to speed up about 1 second during that duration. And if I leave the watch unworn for 12 hours or so, it will tend to slow down for about 1.5-2 seconds. All in all the average performance is -1 second per day!

15 October 2008, 12:54 AM	#2
Latrodectus 2024 SubLV41 Pledge Member Join Date: Sep 2008 Real Name: Fred Location: KY, USA Watch: GMT-Master II Posts: 10,042	thank you for your great report and the links __________________ Member # 16057 4-Hands Club Tosser Club Member TRF Skypers Group

15 October 2008, 12:59 AM	#3
golfball123 "TRF" Member Join Date: Apr 2008 Location: thailand / m'sia Watch: YG DD & GMT,TT SUB Posts: 1,265	thanks fr the info __________________ Present Collections TT Date-just, TT Sub. (Bluesy), YG Date-Date, YG GMT IIc (Black dial). SS GMT IIc

15 October 2008, 01:04 AM	#4
bardm "TRF" Member Join Date: Apr 2008 Real Name: Bård Location: Oslo - Norway Watch: None Posts: 1,014	I think that is a very good result __________________ Bård

15 October 2008, 01:08 AM	#5
Quicksilver "TRF" Member Join Date: Jul 2008 Real Name: David Location: London+Guangzhou Watch: ing watches Posts: 2,603	Excellent result - congrats. My Sub is still loosing 5 secs a day even with my fully winding it twice a day __________________ Rolex Sea Dweller 116600, GMT Master II 16710 (Pepsi) and 116710 BLNR, Daytona 116500LN, Submariner 14060M.

15 October 2008, 01:08 AM	#6
pilfilr "TRF" Member Join Date: Jul 2008 Real Name: Mark Location: Florida Posts: 138	Funny, I have the opposite results on 4/5 watches. My new DSSD runs slow... I will try your suggestions. All others are never fully wound and worn occasionally..all run a little fast. Cheers! __________________ Just keep the wings level...I'll be right back! DEEPSEA "M", TT SUB Serti Champagne "F", GMT II "COKE" "F" (currently wearing a Pepsi), TT DJ CHAMPAGNE BATTON "P", TT BREITLING CROSSWIND, SS Ceramic Sub (Black), Panerai 288 Radiomir.

15 October 2008, 02:33 AM	#7
scottjal "TRF" Member Join Date: Aug 2008 Real Name: Scott Location: SC Watch: GMT II Posts: 464	Yes, 3186 is proving to be an excellent movement and mine is doing very well accuracy wise too. Usually around a second or less gain a day face up over night and I can correct that by laying crown down over night and slowing it down a bit to loose a second a day. Simply can't ask more of a mechanical movement. __________________ sj

15 October 2008, 02:43 AM	#8
Ivy League Banned Join Date: Oct 2007 Location: Earth Watch: 116710LN Posts: 448	hey Scott: Several members are now claiming that laying a 3186 watch either crown up or down will not affect the accuracy to speed up/slow down your watch. Have you really detected a difference in this ? Secondly, when does your date flip on the GMT IIc please ? Just curious.........

15 October 2008, 02:56 AM	#9
padi56 "TRF" Life Patron Join Date: Jun 2005 Real Name: Peter Location: Llanfairpwllgwyng Watch: ing you. Posts: 53,036	Now please stop worrying about your watch just wear and enjoy it for the next 30 years. __________________ ICom Pro3 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.club Second in command CEO and left handed watch winder

15 October 2008, 03:04 AM	#10
Art161 "TRF" Member Join Date: Jun 2008 Real Name: Art Location: San Francisco Watch: Sundial Posts: 2,266	Great result. Glad I was able to be of some help. __________________ Rolex SS Oyster Perpetual no date, TT Datejust Member #13992 HM Power to the Superlative Panda, officially certified! HMPanda eats, shoots and leaves. Rolexers do it with perpetual movements.

15 October 2008, 05:12 AM	#11
Dr S Member Join Date: Dec 2006 Real Name: Scott Location: UK Watch: 1665/16610lv/16600 Posts: 101	Best accuracy of any mechanical watch I have :)

16 October 2008, 04:31 AM	#16
eric23 "TRF" Member Join Date: Apr 2008 Real Name: Eric Location: Calgary Posts: 9,595	Sounds like a great watch!

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)