Amazing accuracy

[Bybybmw]

I started on Nov. 1 checking my +/- on my new OP.
As of this evening it averages -0.07 spd.
That is amazing accuracy for a mechanical watch. Hope I am that lucky if/when I find another Rolex I want/can afford.

[FHFinster]

My 214270 also is impressively accurate. It’s a machine, not a microchip, and a man built it.

Gosh, doesn’t that feel good.

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[DGB]

How did you manage to time 7/100 of a second?
This can’t be constant, the movement is affected by the heat, how tight the watch is on your wrist, how your wrist move during the day, etc..
Still, quite amazing.


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[77T]

I am guessing an app on a smartphone is involved - or maybe a dedicated watch timer. Either way, you have a well calibrated movement in that OP.

It does happen from time to time - and congrats on having one that pleases.


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[Bybybmw]

Originally Posted by DGB

How did you manage to time 7/100 of a second?
This can’t be constant, the movement is affected by the heat, how tight the watch is on your wrist, how your wrist move during the day, etc..
Still, quite amazing.


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Originally Posted by 77T

I am guessing an app on a smartphone is involved - or maybe a dedicated watch timer. Either way, you have a well calibrated movement in that OP.

It does happen from time to time - and congrats on having one that pleases.


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This is nothing but seconds vs days, no app, just math. In 27 days the watch lost 2 seconds. so 2/27=0.07407 Note that this is nothing more than an average over time span, no way to tell what the variations over time, temp., attitude of the watch, etc. may be.
Bottom line, just something fun to do as I learn.

[JRT]

Originally Posted by Bybybmw

This is nothing but seconds vs days, no app, just math. In 27 days the watch lost 2 seconds. so 2/27=0.07407 Note that this is nothing more than an average over time span, no way to tell what the variations over time, temp., attitude of the watch, etc. may be.
Bottom line, just something fun to do as I learn.

You should record the time once a day (at the same time) instead of taking an average value over 27 days. For example:

1st day: +10 sec.,
2nd day: -10 sec.,
3rd day: +10 sec.,
4th day: -10 sec.,
...
Average : 0 sec. (no gain and no loss over a very long time period)
You cannot claim it is a super accurate movement only because of its surprising average value.

[Jostack]

Originally Posted by JRT

You should record the time once a day (at the same time) instead of taking an average value over 27 days. For example:

1st day: +10 sec.,
2nd day: -10 sec.,
3rd day: +10 sec.,
4th day: -10 sec.,
...
Average : 0 sec. (no gain and no loss over a very long time period)
You cannot claim it is a super accurate movement only because of its surprising average value.

Never heard of a Rolex doing +10 one day and -10 the next. You were probably using an extreme example to make a point?

If it is averaging near zero, the day to day variation is still going to be very small.

[JRT]

Originally Posted by Jostack

Never heard of a Rolex doing +10 one day and -10 the next. You were probably using an extreme example to make a point?

If it is averaging near zero, the day to day variation is still going to be very small.

Yeah. It was just an extreme example. Another example that Rolex movement may take place:

1st day: -3.1 sec.,
2nd day: -2.1 sec.,
3rd day: +2.0 sec.,
4th day: +3.2 sec.,
.... (same pattern over a long time period)
Average: close to 0 sec. (almost no gain and no loss)

The day to day variation for this example is not so surprisingly small as you imagine, although it has a very good average value.

[Rolex-istanbul]

they moved my amazing story for the extreme accuracy to another forum anyways,

My watch is 114060 and its plus 2 seconds per year now. over year I guess 14 months old now.

How do I obtain this is https://www.rolexforums.com/showthread.php?t=711024

Follow this thread and you will find it out.

I can make any watch accurate you just need the understand the watch and follow its rhythm through your life.

[Patapt]

My GMT-Master 1675 that I bought new 50 years ago in Singapore when I was a teenager, is currently gaining about 6 seconds a month. I know as I have to adjust it when the calendar changes and daylight savings, so that is when I reset it to a "radio controlled" clock. I've worn it 24/365 all those years, except the few times when it's gone for service.

[padi56]

I think many of you guys have far to much time on your hands.

[Bybybmw]

I will never be a WIS, but TRF and the posts here made me wonder just how accurate these watches are, so that lead me to my small experiment.
I checked my watch once a day at the same exact time over the 27 days and during that time period is I noticed the 2 second lag.
I have no intentions of checking any closer but I can tell you that I did not see any real deviation day to day no matter how different my activity level was, it just very slowly lost those 2 seconds.

[Jostack]

Originally Posted by padi56

I think many of you guys have far to much time on your hands.

No, with our amazingly accurate watches, we are just so much more efficient :)