Gmtii

[nsolga]

How long should the power reserve be for my GMTII?

As I rotate between watches, I fully wind my GMT to 45/50 full rotations of the crown. Then I would wear it for a day or so, and then set it down to find it only lasts around 36 hrs.

I've heard it should last 48 hrs.


I'm winding it up and letting it run down fully to check. I'm not too worried, just wondering.

[Speed]

I heard 40's as well...Have yet to test mine tho.

[leonidas]

i had this happen when my GMT II was new. as the few years have gone by, it seems to be less subject to stopping after its one-day rotation with my EXP II. however, this has been more of a case with my newer EXP II, and i find that i am winding it the night before i plan to wear it the next day. and if i don't, when it gets close to running out, it will gain suddenly some 5 seconds, messing up its oterhwise perfect running. i have vaccilated over getting a winder for this, and hate to be opening the stem every other day. but as i am careful doing so, i hope that no moisture gets in to start to discolor the luminescent markings. the GMT is due for its first servicing soon, and i plan to ask them to check the reserve time.

[PeterT]

I am doing a power reserve test on all of my watches at the moment. I got all of them going this evening and gave them 50 turns. So this test is comparing 3135 movement Submariners with 3185 movement GMT IIs and a 3135 movement SD.
My question is, what is classed as a turn? Does it need to be the full 360 degrees? I am not sure that this happens with the normal moving the thumb back and forth over the end of the first finger technique!

Peter

[sleddog]

Originally Posted by nsolga

How long should the power reserve be for my GMTII?

As I rotate between watches, I fully wind my GMT to 45/50 full rotations of the crown. Then I would wear it for a day or so, and then set it down to find it only lasts around 36 hrs.

I've heard it should last 48 hrs.


I'm winding it up and letting it run down fully to check. I'm not too worried, just wondering.

Nick,I'm getting around 48 hours give or take a few min's either side.....
Try it withuot wearing for the day first!!!! It should actually do a little better than that. Give it 40 to 45 winds and set it down face up to test.......
With you wearing it for the day first,it could be losing a little wind value during your wear,if that makes sense to you!!!
Hope that helps,let us know how it did after that!
Rob.

[nsolga]

Originally Posted by PeterT

I am doing a power reserve test on all of my watches at the moment. I got all of them going this evening and gave them 50 turns. So this test is comparing 3135 movement Submariners with 3185 movement GMT IIs and a 3135 movement SD.
My question is, what is classed as a turn? Does it need to be the full 360 degrees? I am not sure that this happens with the normal moving the thumb back and forth over the end of the first finger technique!

Peter

Peter,

I think they do me full rotations but, you can simply over turn to over compensate I believe. So, turn it say, 60 times to be safe. There is a safety clutch that keeps for over-winding unlike on other lesser autos.