Power Reserve Test!!!!!!

[sushisummo]

Hi all,

I recently saw a thread on power reserve on Rolex should be about 40-48 hours on fully wound from a dead stop. I did my own test (wounding it 45 times) and here's the results below:

1) TT GMT IIc (V series) only 37:35 hours

2) TT Datejust (M series) only 38:35 hours

3) SS Yacht Master (M series) only 38:35 hours

All three watches did not reach the 40 hours mark. Is that Normal?

Just wondering.

Thanks all.........

[Andad]

Hi JT,

I checked all mine and you will find the results if you search 'power reserve'.

No big deal really - if you wear one for a week it will stay wound - if you don't wear the others - they will stop.

Who really cares.

ps: I gave mine 50 - to be sure.

[sturgeon123456]

What is the power reserve on the Daytona.....I thought someone here posted 74 hours???

[sushisummo]

Originally Posted by directioneng

Hi JT,

I checked all mine and you wil find the results if you search 'power reserve'.

No big deal really - if you wear one for a week will stay wound - if you don't wear the others - they will stop.

Who really cares.

ps: I gave mine 50 - to be sure.

Thanks Eddie.........I saw your test results and they are definetly more then 40 hours........You are right....who cares if you are wearing it, it should keep running. I guess I'm just being anal about it..........

[Andad]

Originally Posted by sturgeon123456

What is the power reserve on the Daytona.....I thought someone here posted 74 hours???

Sounds about right.

[padi56]

Originally Posted by directioneng

Hi JT,

I checked all mine and you will find the results if you search 'power reserve'.

No big deal really - if you wear one for a week it will stay wound - if you don't wear the others - they will stop.

Who really cares.

ps: I gave mine 50 - to be sure.

Have to agree as long as my ticker is still going that's good enough for me now, if watch stops easily remedied by by winding the crown.

[dmc]

I took my GMT IIC off at 1630 on 01/07 and it stopped at 1235 today, 44hr 5min. I didn't do anything special, no extra winding just placed it on its back.

I did this just to see how much power the watch has under my normal wearing habits. According to my notes I believe it lost 5 seconds during the period. And that equates to a loss of 2.73 seconds per day. Of course this may not be a fair assesment since the last couple of hours the watch ran on very low power. The watch did seem to make use of all the power in the mainspring, as it took considerable winding to get it going again.

I am wondering if letting a mainspring return to a completely relaxed state(letting a watch run until it stops), and then reloading it by winding, has any effect on the accuracy of a watch?
The reason I'm asking is because a mainspring can and should contract and expand depending on the temperature. Could this have an effect on the torque exerted against the train?

[JJ Irani]

Originally Posted by sushisummo

Hi all,

I recently saw a thread on power reserve on Rolex should be about 40-48 hours on fully wound from a dead stop. I did my own test (wounding it 45 times) and here's the results below:

1) TT GMT IIc (V series) only 37:35 hours

2) TT Datejust (M series) only 38:35 hours

3) SS Yacht Master (M series) only 38:35 hours

All three watches did not reach the 40 hours mark. Is that Normal?

Just wondering.

Thanks all.........

Sorry, JT......but those results are very disappointing. They are all new watches and if you say you gave them 45 turns of the crown, you should have got very close to 48 hours from each of them.

I have a feeling you haven't wound them properly as you should have. Those readings are ridiculous!!

Do the test again.....this time make sure you make one complete revolution of the crown about 45~50 times each.

JJ