Great info on the GMT !!!

Terrific. highly educational. Now I must have one.

Awesome thread.:thumbsup: So many variations and subtleties of the GMT and GMT II.

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

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?

Great info! thanks!

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

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

Thanks!

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

Enjoy.

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

It is indeed true

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.

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.

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

Great read after picking up my 16760.

I love GMT master, mine is 16700 pepsi

i love the gmt pepsi very beautiful...

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

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

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.

http://farm6.static.flickr.com/5190/...3a38c575_o.jpg

Thanks Larry,

Great Article!

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

http://s1.directupload.net/images/11...p/pj5mwf2i.jpg

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

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?

Great read and review.

Thanks again Larry for another informative post.

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.

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

Keep up the good work, gents.

Jeffrey P. Hess

Awesome thread, Larry. Thanks for the informative post!