Hi,
I bought a new speedmaster 3861. METAS says 0 to +5daily average, but I have got -0.5 daily average. I fully wind it every day. Shouldn’t it never run slow? I mean the specs didn’t say -1 to +5.
How are you timing it. Is it consistently .5 seconds? Is that average overall or in a certain position? Have you tried laying it down at night in a different position ( heads up, heads down, etc)?
METAS is a laboratory condition average that doesn't necessarily reflect real-world conditions, even though it attempts to. METAS allows below-zero for some orientations, as long as the weighted average ends up between 0 and 5, which is different than 0-5 in every position. IF you are keeping the watch in its 'slow' orientation (or fast one!) for a majority of the time, it is definitely possible to end up higher/lower than METAS.
I time it with WatchAccuracy. This is the average overall. I did try to lay it in different positions but the average overall 3 weeks has been -0.5.
Well, what is the meaning of METAS guarantee of 0-5 average if this is not what is experienced in real-world conditions? Maybe they should explicitly say 0-5 lab conditions and -3-+8 in real-world conditions.
The 0-5 seconds is a range for the AVERAGE rate. This is the average of the rates measured in 6 different positions. These positions are given equal weight in the average.
If the average rate can be zero, that means that some individual positions can run below zero…losing time. If you were to wear your watch so that it spent equal time in all of those 6 positions throughout the day, your results would match the METAS results.
But that isn’t real life. Your particular wearing habits may favour a position that runs slow, so your average is skewed to the slow side.
METAS allows the variation to be as much as 12 seconds over those 6 positions. So to give a simple but extreme example let’s assume the following:
Dial up = +6
Dial down =+6
Crown down =+6
Crown right =-6
Crown up =-6
Crown left =-6
The average rate is zero. But if you wear your watch such that your arm is down by your side all day, then it will skew fast because if you wear it on your left wrist it will be crown down a lot of the time, and if you wear it on your right wrist it will skew slow because the crown is up a lot of the time.
I hope this helps explain how the standard works.
Keep in mind that I’ve never seen anything from Omega that guarantees that the watch will never run slow, but I’ve seen others make this claim.
Cheers, Al
What do you think resting positions that make it run a bit fast? Or maybe every watch is different
How about you address the question and not troll like a child?
OCD…
I time it with WatchAccuracy. This is the average overall. I did try to lay it in different positions but the average overall 3 weeks has been -0.5.
How about you address the question and not troll like a child?
Do you use the timegrapher feature of that app, or compare to the Atomic clock function? I ask, because I would suspect an iPhone based timegrapher function is not that accurate (especially since it likely assumes a lift angle).
Best (and cheapest method) is to use time.gov. Take a photo of your watch next to the screen THEN compare times for the offset. This is more accurate than trying to judge the time offset visually by your eyes looking back and forth between the watch and the screen.
