zOwie Omega Discussion Forum

: Hey John, it seems to be doing just fine.
: Although I have always wondered how you guys
: measure that. I have never known how to do
: that but would like to learn. My Aqua Terra
: has been on the winder for the last week and
: it still seems as acurate as always as well.

: If anyone can inform me how to measure accuracy
: of a watch, I'd like to know. Thanks!!!!!

: Larry

Hi Larry,

I use the website in the link below, which is to the official US time clock. The first thing you need to do is synchronize your watch with this site. Then come back and check the time again after a week or so and see how many seconds your watch has gained or lost over the course of a week. You can then divide that number by 7 to get an idea on your watch's daily timekeeping.

Since your watch is new, it is still in its "settling in" phase, so it may be a few weeks or a month before you start to notice its time gain or loss remaining consistent. -4 to +6 seconds per day is the COSC chronometer specification, and even though your Speedy Date isn't a chronometer, it is certainly capable of running within those specs.

You can also experiment with different overnight positions to try to optimize your watch's accuracy. Every mechanical watch behaves differently, so it's all a matter of trial and error. You may find that your watch gains about 4 seconds a day while on your wrist, but it will lose a few seconds overnight while kept in a certain position (crown up, crown down, dial up, etc.). So, you can help "offset" any time gain or loss by experimenting with overnight positions.

Part of the fun of owning an automatic watch is checking its timekeping and trying to optimize it. Since you have a new watch, you should be able to have some fun experimenting.

Good luck,
John