Accuracy

[chicagowatchman]

My Rolex Day date is about 20 seconds slow for
The month when I did an accuracy test on toolwatch it
Said I was -2 then my watch would be a minute slow after one month
I tested it for 24 hours
What gives?

[beshannon]

No idea?

How old is it?
Fully wound?
Are you wearing it or leaving it sit?

A minute slow for a month is -2 seconds a day. Pretty great if you ask me.

What is your question again?

[bobernet]

Accuracy tests are under the conditions at whatever moment you test. Actual performance over time on and off the wrist, in a box or winder, wound fully and partially wound can and do vary.

Whether it was 1 min/month or 20 seconds/month, both are outstanding. Enjoy.

[mgsooner]

Need clarification but I think he's saying it lost 20 seconds in one 24 hour period?

[chicagowatchman]

Originally Posted by beshannon

No idea?

How old is it?
Fully wound?
Are you wearing it or leaving it sit?

A minute slow for a month is -2 seconds a day. Pretty great if you ask me.

What is your question again?

It is 20 years old just had it serviced in January
My question is if it was running slow 2seconds that would equal
One minute a Month but the watch is actually 20 seconds slow for the month

[chicagowatchman]

Originally Posted by mgsooner

Need clarification but I think he's saying it lost 20 seconds in one 24 hour period?

No it lost 20 seconds in one month

[mgsooner]

Originally Posted by chicagowatchman

No it lost 20 seconds in one month

20 seconds slow over 30 days? Or so far this month (April), meaning 4.5 days?

[chicagowatchman]

Originally Posted by mgsooner

20 seconds slow over 30 days? Or so far this month (April), meaning 4.5 days?

20 seconds slow for the month of March

[Zakalwe]

Your watch appears to be in rude health.

[hoppes-no9]

The one day that you measured it doesn’t necessarily represent the conditions over the entire month. The rate will vary depending on a lot of factors, including the position the watch is in, temperature, whether it’s fully wound or not, etc.

A watch that on average is off by +3 seconds per day, for example, might be off by +1 second on one day, and +5 seconds on the next day, and so on

[mgsooner]

I'm hitting the eject button. I'm lost.

[watchmaker]

Originally Posted by chicagowatchman

20 seconds slow for the month of March

Averaging -0.6sd is excellent performance. Your watch is fine.

[Jmbarrack]

Let me summarize because the opening post is quite confusing.

- As Toolwatch measured: Your watch SHOULD be 60 seconds slow per month
- When ACTUALLY measured: your watch was 20 seconds slow in a 1 month period

You're asking why the variance between Toolwatch and actual results correct?

[Jostack]

I’ve found Toolwatch to not account for latency in connection when testing. If you have a spotty connection, that could cause a problem with taking measurements with Toolwatch. I recommend using a time standard like an Apple Watch or iPhone or something equivalent that regularly updates its time offset.

If latency is not contributing to the measurement discrepancy, it is likely as others have suggested that you test one time and it is slow. Another time it could be slightly fast. The variables that cause a watch to run slow or fast are difficult or impossible to control for if you are wearing the watch. Positional variations as you wear your watch through the day mean that one day it could lose 2 sec. the next day, it may gain 1 sec. it can be all over the place over the course of a month, but averages out to your 20sec.

If you can find a resting position that gains or loses time, you can compensate for these variations by placing the watch in a certain position overnight. This can allow the watch to ‘catchup’ or slow down as necessary.

[chicagowatchman]

Originally Posted by Jmbarrack

Let me summarize because the opening post is quite confusing.

- As Toolwatch measured: Your watch SHOULD be 60 seconds slow per month
- When ACTUALLY measured: your watch was 20 seconds slow in a 1 month period

You're asking why the variance between Toolwatch and actual results correct?

Yes why is it so different?

[jimcameron]

Sell that old watch and buy yourself a nice quartz Invicta.

[georgekart]

Positions, how wound the watch is etc can have an effect on accuracy of the watch, I have had periods where my watch averages 0s over course of two months, doesn't mean it's as accurate all the time, I noticed it runs fast usually, but slower when it's power reserve is low, so if my watch gains 5s a week, it can then lose them over a day when I don't wear it, etc.

[Dennisoul]

Originally Posted by mgsooner

I'm hitting the eject button. I'm lost.

[Dirt]

Originally Posted by chicagowatchman

My Rolex Day date is about 20 seconds slow for
The month when I did an accuracy test on toolwatch it
Said I was -2 then my watch would be a minute slow after one month
I tested it for 24 hours
What gives?

Look, it's very simple.
Either the app or what ever you are using is actually inaccurate. And or it cannot possibly account for perfectly natural variations in rate that occur with your watch when worn, used(or not) in accordance with your normal usage patterns or daily habits.
Either way, your watch is doing much better than most and certainly better than indicated.
You are in a very good place

I don't know if your parents ever told you this, but you do know you ought not look a gift horse in the mouth?

All watches behave differently as no two are the same. Some have a wider variation from others and some are very similar.
I have one in my collection that seems to run between 11-19 seconds fast per day when not on the wrist and seemingly dependent upon resting position.
When on the wrist for the bulk of the day it settles down to about 2-3 seconds fast per day. As it's not a Chronometer I'll take that all day every day.
I also keep in mind that it may in all likelihood come back from a service running worse.

As long as the watch is displaying precision. That's the main thing to worry about. But the accuracy your watch is currently displaying is at the top end of fine

[JR16]

Why did you start this thread and waste everyone’s time ? Your watch is running nearly perfect , within the best possible possible parameters , and you are
Complaining ? Please elaborate.


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[JacksonStone]

Originally Posted by JR16

Why did you start this thread and waste everyone’s time ? Your watch is running nearly perfect , within the best possible possible parameters , and you are
Complaining ? Please elaborate.

I think OP was simply trying to figure out the disparity between his accuracy test and the actual performance of his watch. Granted, in order to reach that conclusion, I'm having to rely on my background as a college instructor and my finely honed ability to decode poorly written papers that make me wish to inflict Oedipal harm to my orbits.

[Jostack]

It was pretty clear that he didn’t understand why there was a discrepancy between the app and his real world results.

I didn’t see any complaints about the watch accuracy.

[chicagowatchman]

Thanks for all your responses
I will give it 40 winds and measure it in a few days

[chicagowatchman]

Just measured it and
Says -1 down from-2 yesterday
Will I continue to get different results in the next few days and weeks?

[chicagowatchman]

Just got back from a 2week trip
Checked the accuracy and the watch is now 1 spd fast

[Largoshark]

Originally Posted by hoppes-no9

The one day that you measured it doesn’t necessarily represent the conditions over the entire month. The rate will vary depending on a lot of factors, including the position the watch is in, temperature, whether it’s fully wound or not, etc.

A watch that on average is off by +3 seconds per day, for example, might be off by +1 second on one day, and +5 seconds on the next day, and so on

This.

Your watch is working fine, and well within the superlative chronometer rating. The fact that you revived this thread after over a month tells me that you are way too fixated on a total non-issue. My advice would just be to chill out and enjoy the watch.

[padi56]

Originally Posted by Largoshark

This.

Your watch is working fine, and well within the superlative chronometer rating. The fact that you revived this thread after over a month tells me that you are way too fixated on a total non-issue. My advice would just be to chill out and enjoy the watch.

Have to agree another case of {CCTAS} constant checking time accuracy syndrome. Which in time will take all the pleasure out of owning and wearing a Rolex watch.Plus the fact none of these apps are 100% accurate the OP should be singing for joy to have such a accurate mechanical watch.