1978 Pepsi Rolex GMT Master

[Willarikk1]

Hello my very first post and was wondering if someone could kindly help. I have inherited my late fathers Rolex but unfortunately we don't have any instructions. Despite asking in Northern Goldsmiths and scouring the internet I'm still no further forward. I'm looking for information on how to set the time zone hand. Please note unlike newer versions ie GMT Master II, there are only 2 clicks when releasing the crown not three.

Any support would be much appreciated.

Kind regards Ian

[Tools]

The 24 hour hand shows the same time as the dial hand and is synced to it. Set it like you do any other watch except ensure the 24 hr hand is reading either pm or am..

If you want to "track" another time-zone you offset (turn) the bezel the appropriate number of hours.

[azguy]

If it's really a 1978 vintage it's a 1675 model (non-quick set I believe)

http://www.gmtmasterhistory.com/gmt-..._ref_1675.html

[Willarikk1]

Originally Posted by Tools

The 24 hour hand shows the same time as the dial hand and is synced to it. Set it like you do any other watch except ensure the 24 hr hand is reading either pm or am..

If you want to "track" another time-zone you offset (turn) the bezel the appropriate number of hours.

Sorry I'm not quite sure what you mean. Whilst it may make sense to you unfortunately it doesn't to me. Thanks

[Willarikk1]

Originally Posted by azguy

If it's really a 1978 vintage it's a 1675 model (non-quick set I believe)

http://www.gmtmasterhistory.com/gmt-..._ref_1675.html

Thanks yes that's mine. Black face, Pepsi bezel it's a 1675 model. Thanks just need laymens instructions now.

[strafer_kid]

Super watch - you will love it - enjoy in good health!

[Tools]

Originally Posted by Willarikk1

Sorry I'm not quite sure what you mean. Whilst it may make sense to you unfortunately it doesn't to me. Thanks

Not sure I can make it any simpler.

The watch sets the same as any other watch in the world. The extra hand tells you exactly the same time as the dial hand except in 24 hr format, it does not set separately.

If you want to see a different time-zone you rotate the bezel..


Hmmmm, nope.. I can't say it any simpler..

[Jonnyred72]

Originally Posted by Tools

Not sure I can make it any simpler.

The watch sets the same as any other watch in the world. The extra hand tells you exactly the same time as the dial hand except in 24 hr format, it does not set separately.

If you want to see a different time-zone you rotate the bezel..


Hmmmm, nope.. I can't say it any simpler..

Yep. first click to wind, second click to set the time-make sure bezel is set so '0' is at 12 o'clock position, set GMT hand to 24 hour time on bezel, hour hand should read the same time but in 12 hour format.

I can't make it simpler either!

[springer]

The GMT-MASTER model 1675, model 16750 and model 16700 do not have an independent 24-hour hand.

What this means is...the 24-hour hand can not be independently set. It moves in conjunction with all the other hands.

The 24-hour hand is capable of telling time in a secondary time zone by reading where the 24-hour hands points on the outer ring which is also called the bezel insert.

If your outer bezel insert has the triangle aligned with the 12 marker found on the face of the dial, the 24-hour hand will always read the same time as the hour, minute and seconds hands on the dial.

As an example, let's set the bezel ring to a different time zone:

Align your bezel as I described earlier, with the triangle in the bezel insert aligned with the 12 marker on the dial.

Let's say it is 1210pm in California, the 24-hour hand will be pointing at the 12 on the bezel ring. Let's say it is 2pm in California, the 24-hour hand would be pointing at the number 14 on your bezel insert which means 1400 hours which translates to 2pm.

Let's say that while in California, you want to set your 24-hour hand to read the time in Dallas, which is two hours ahead of California. If it is 2pm in California, which is 1400 hours, it would be 1600 hours in Dallas. Rotate your outer bezel until the 16 on the bezel ring aligns with the 24-hour hand. While your watch dial will still read California time (2PM) the outer bezel ring is now giving you Central Standard Time which is two hours ahead and the 24-hour hand is pointing at the 16 on the bezel ring.

This is probably the simplest way to set your bezel insert to another time zone. The key is knowing that the distance between each two markers on the dial is "2" hours. If you only wanted to know the time in Denver, which is one hour ahead of California, you would move your bezel insert to the left and the triangle on the bezel insert would point between the 11 and 12 markers on the dial. Two hours ahead, and the triangle on the bezel insert would point to the 11 marker on the dial...and so on...and so on.

Since the bezel insert reads 24 hours - not 12 hours like the dial, it is necessary to move the bezel ring according. Again, moving the bezel triangle from one dial marker to another is equal to two hours - not one hour.

Hope this helps.