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sea-dweller · 6 January 2010, 02:24 PM

Great info on the GMT !!!

LouS · 7 January 2010, 08:58 AM

Terrific. highly educational. Now I must have one.

RLXSTR · 5 March 2010, 08:26 AM

Awesome thread.

So many variations and subtleties of the GMT and GMT II.

not_a_doctor · 6 March 2010, 06:04 AM

This thread is helping fuel the fire for my quest to pick up the perfect GMT...

TerryF · 25 April 2010, 07:43 PM

Quote:

Insert sizing:
The 1675/16750 ...............have an I.D. of 30.2 and an O.D. of 37.75mm
The 16700/16760/16710.... have an I.D. of 30.7 and an O.D. of 37.65mm

Larry

I just checked the size of the original pepsi insert and came up with an ID of 30.26 and OD of 37.82mm - close enough to what you had and I was using a manual micrometer, not digital.

The black insert that I was sold has an ID 30.24 and OD of 37.91?? Tried everything to get it to fit but no joy. Do you know if there were ever these kinds of variations? The ID being the same as your measurements of the 1675/16750 rule out it possibly being for the 16700 series as I originally thought may be the problem.

I am certain this is an original insert. Any ideas?

brigadoonb · 6 May 2010, 03:42 AM

Great info! thanks!

rolexjunkie · 6 May 2010, 04:26 PM

Great info and we learn something everyday. However, I have two questions here (search through and can't find it in this forum. If yes, please send the link to me. Thanks!)
1. what's the different between GMT Master II TT and GMT Master II SS?
2. the home time & local time could be read simultaneously on the face of the watch, how to read the third time zone? (I remember I read it somewhere GMT Master II can show 3 time zones. Right?)

Tools · 7 May 2010, 12:59 AM

Quote:

Originally Posted by rolexjunkie

Great info and we learn something everyday. However, I have two questions here (search through and can't find it in this forum. If yes, please send the link to me. Thanks!)
1. what's the different between GMT Master II TT and GMT Master II SS?
2. the home time & local time could be read simultaneously on the face of the watch, how to read the third time zone? (I remember I read it somewhere GMT Master II can show 3 time zones. Right?)

1) There is no difference exept for the added gold color.

2) The third time-zone is only momentarily shown by turning the bezel

dalip · 7 May 2010, 01:05 AM

Thanks Larry. Fantastic info in a concise and clear way. All the better now I have one on the way to my front door!

rolexjunkie · 7 May 2010, 11:53 AM

Quote:

Originally Posted by Tools

1) There is no difference exept for the added gold color.

2) The third time-zone is only momentarily shown by turning the bezel

Thanks!

I found this on the internet on how to use bezel to read the third timezone.

Enjoy.

eujin · 28 May 2010, 12:56 AM

is it true that the old gmt hand cannot moe separately witht he hour hand? and they have no cert?

TerryF · 28 May 2010, 02:34 AM

Quote:

Originally Posted by eujin

is it true that the old gmt hand cannot moe separately witht he hour hand? and they have no cert?

It is indeed true

ETT · 29 June 2010, 02:14 PM

Thanks Larry for a great thread and a great explanation of the changes through the years. I'm a newbie looking to buy my first GMT in memory of the one my Father had lost. A very sentimental purchase and I want to get it right. Your info and links have really been helpful in my research and trying to figure out the model year of my father vs. buying a later model year.

Tools · 30 June 2010, 01:27 AM

Quote:

Originally Posted by eujin

is it true that the old gmt hand cannot moe separately witht he hour hand? and they have no cert?

As Terry said, it is indeed true.. (although I'm not sure what you mean by cert)

Let me expand though..

It's not really the "old GMT hand" that cannot move separately...It is a different watch..

The original GMT is the GMT Master. This watch has a 24 hr hand that moves at 1/2 the speed of the standard (Mercedes) hour hand, is syncronized to it, and the 24 hr bezel is used for all the variations and zones for the 24 hr hand. This watch was produced from 1954 up through 1999 and was still available into the 2000's..

The GMT Master II was introduced concurrently (both models were out at the same time) in the early 1980's and came with an independently adjustable hour hand; the 24 hr hand is still the same as it always was........... It is also still produced today..

So, to be technically clear... on the GMT II, the hour (Mercedes) hand is independently adjustable and always has been....not the 24 hr hand (some may call it a GMT hand, but that is the name of the watch, not the hand). On the GMT Master they are synced.

There is an almost 20 year period where both GMT models were produced/available; the GMT Master and the GMT Master II.

DOUBLE 0 SE7EN · 30 June 2010, 08:35 AM

...and it is a great piece of art...

crockey · 7 July 2010, 02:26 AM

Great read after picking up my 16760.

Rolex77 · 9 July 2010, 11:47 AM

I love GMT master, mine is 16700 pepsi

tep663 · 10 August 2010, 10:52 PM

i love the gmt pepsi very beautiful...

niseko · 14 August 2010, 07:35 PM

Anyone know what type of steel is used in the 16710?

Tools · 11 April 2011, 08:29 AM

Quote:

Originally Posted by niseko

Anyone know what type of steel is used in the 16710?

All 16710's have been produced after Rolex began using 904L steel..

77T · 11 April 2011, 11:55 PM

Quote:

Originally Posted by Rolex77

I love GMT master, mine is 16700 pepsi

Speaking of Pepsi bezels - in a different thread discussing bezels, another member named "Speed" shared a photo by Mike the Mod that I thought was a striking example of variations over the years.

Just sharing in the spirit of community - photo credit goes to Mike.

edbsbc78 · 16 April 2011, 08:32 AM

Thanks Larry,

Great Article!

bazin · 28 April 2011, 09:18 AM

My 1978 GMT-Master 1675.........I wear it every day since 1978..........

jwes · 18 August 2011, 11:57 AM

What is the newest/latest GMT-II on the shelves right now? does it start with a "G"?

jwes · 18 August 2011, 12:02 PM

oh and I just bought my second GMT II... First one was in 2001 and had a green holigraph sticker on the back. My new GMT II doesn't have one?

SWIMPRUF · 17 September 2011, 12:29 AM

Great read and review.

dddrees · 17 September 2011, 04:48 AM

Thanks again Larry for another informative post.

RC2 · 2 October 2011, 12:20 AM

Quote:

Originally Posted by TerryF

Larry

I just checked the size of the original pepsi insert and came up with an ID of 30.26 and OD of 37.82mm - close enough to what you had and I was using a manual micrometer, not digital.

The black insert that I was sold has an ID 30.24 and OD of 37.91?? Tried everything to get it to fit but no joy. Do you know if there were ever these kinds of variations? The ID being the same as your measurements of the 1675/16750 rule out it possibly being for the 16700 series as I originally thought may be the problem.

I am certain this is an original insert. Any ideas?

Had same issue. I have a black insert for my 16710 and it willnot fit on the watch. The insert is .2mm too thick when compared to my others.

jeff hess · 2 October 2011, 09:37 AM

Truly one the best threads (of many) on this wonderful forum.

Keep up the good work, gents.

Jeffrey P. Hess

Ultraman · 2 October 2011, 02:37 PM

Awesome thread, Larry. Thanks for the informative post!

6 January 2010, 02:24 PM	#31
sea-dweller "TRF" Member Join Date: Oct 2007 Real Name: Dennis Location: Bay Area - 925 Posts: 40,018	Great info on the GMT !!! __________________ TRF Member #6699 (since September 2007)

7 May 2010, 01:05 AM	#39
dalip "TRF" Member Join Date: Sep 2009 Real Name: Dalip Location: Mumbai and Perth Watch: Rolex PAM Omega Posts: 18,656	Thanks Larry. Fantastic info in a concise and clear way. All the better now I have one on the way to my front door! __________________ ------------------------------------------------------------ *"The liar's punishment is not in the least that he is not believed, but that he cannot believe anyone else." George Bernard Shaw*

17 September 2011, 12:29 AM	#56
SWIMPRUF "TRF" Member Join Date: Mar 2011 Location: * Posts: 2,323	Great read and review. __________________ Member# 52,675 Est. 3/2011

17 September 2011, 04:48 AM	#57
dddrees "TRF" Member Join Date: May 2010 Real Name: Dan Location: USA Watch: This N That Posts: 34,251	Thanks again Larry for another informative post. __________________ When it captures your imagination, that's when you know you have found your passion. Loyal Foot Soldier of The Nylon Nation. Card Carrying Member of the Global Association of Retro-Grouch-Curmudgeons

7 January 2010, 08:58 AM	#32
LouS "TRF" Member Join Date: Jan 2010 Location: New York City Watch: GMT II 16710 Black Posts: 142	Terrific. highly educational. Now I must have one.

5 March 2010, 08:26 AM	#33
RLXSTR "TRF" Member Join Date: Mar 2010 Real Name: Donald Location: Texas Watch: Sub5513 / Choc1675 Posts: 826	Awesome thread. So many variations and subtleties of the GMT and GMT II.

6 March 2010, 06:04 AM	#34
not_a_doctor "TRF" Member Join Date: Feb 2010 Real Name: Steven Location: Toronto Posts: 41	This thread is helping fuel the fire for my quest to pick up the perfect GMT...

6 May 2010, 03:42 AM	#36
brigadoonb "TRF" Member Join Date: Apr 2010 Location: USA Watch: Smurf Posts: 429	Great info! thanks!

6 May 2010, 04:26 PM	#37
rolexjunkie Member Join Date: Jan 2010 Location: USJ 14 Posts: 32	Great info and we learn something everyday. However, I have two questions here (search through and can't find it in this forum. If yes, please send the link to me. Thanks!) 1. what's the different between GMT Master II TT and GMT Master II SS? 2. the home time & local time could be read simultaneously on the face of the watch, how to read the third time zone? (I remember I read it somewhere GMT Master II can show 3 time zones. Right?)

28 May 2010, 12:56 AM	#41
eujin "TRF" Member Join Date: Mar 2009 Location: malaysia Posts: 8	is it true that the old gmt hand cannot moe separately witht he hour hand? and they have no cert?

29 June 2010, 02:14 PM	#43
ETT Member Join Date: Jun 2010 Real Name: Ed Location: Vancouver, BC Watch: GMTII 16710Z Pepsi Posts: 100	Thanks Larry for a great thread and a great explanation of the changes through the years. I'm a newbie looking to buy my first GMT in memory of the one my Father had lost. A very sentimental purchase and I want to get it right. Your info and links have really been helpful in my research and trying to figure out the model year of my father vs. buying a later model year.

30 June 2010, 08:35 AM	#45
DOUBLE 0 SE7EN "TRF" Member Join Date: Jan 2010 Real Name: KAAN Location: ISTANBUL Watch: Explorer-PAM233 Posts: 1,645	...and it is a great piece of art...

7 July 2010, 02:26 AM	#46
crockey "TRF" Member Join Date: Nov 2008 Location: Westfield, IN Posts: 256	Great read after picking up my 16760.

9 July 2010, 11:47 AM	#47
Rolex77 "TRF" Member Join Date: Jul 2010 Real Name: Indra Location: Jakarta Watch: ROLEXes, OMEGAs Posts: 154	I love GMT master, mine is 16700 pepsi

10 August 2010, 10:52 PM	#48
tep663 "TRF" Member Join Date: Aug 2009 Location: cavite Posts: 11	i love the gmt pepsi very beautiful...

14 August 2010, 07:35 PM	#49
niseko "TRF" Member Join Date: Jan 2010 Location: London Posts: 64	Anyone know what type of steel is used in the 16710?

16 April 2011, 08:32 AM	#52
edbsbc78 "TRF" Member Join Date: Mar 2011 Real Name: Eusebio Location: San Juan City Posts: 56	Thanks Larry, Great Article!

28 April 2011, 09:18 AM	#53
bazin "TRF" Member Join Date: Apr 2011 Location: N/A Posts: 271	My 1978 GMT-Master 1675.........I wear it every day since 1978..........

18 August 2011, 11:57 AM	#54
jwes Member Join Date: Jan 2008 Location: NY Watch: GMT 11 SS Posts: 28	What is the newest/latest GMT-II on the shelves right now? does it start with a "G"?

18 August 2011, 12:02 PM	#55
jwes Member Join Date: Jan 2008 Location: NY Watch: GMT 11 SS Posts: 28	oh and I just bought my second GMT II... First one was in 2001 and had a green holigraph sticker on the back. My new GMT II doesn't have one?

2 October 2011, 09:37 AM	#59
jeff hess "TRF" Member Join Date: Sep 2008 Real Name: Jeffrey P Hess Location: florida Watch: Patek and Ball Posts: 516	Truly one the best threads (of many) on this wonderful forum. Keep up the good work, gents. Jeffrey P. Hess

2 October 2011, 02:37 PM	#60
Ultraman "TRF" Member Join Date: Apr 2009 Location: Australia Posts: 2,175	Awesome thread, Larry. Thanks for the informative post!

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