Royal oak extra thin timing

[Ku5165]

Hi folks!

Finally got an extra thin (5402). Was searching for a 15202 for a decent amount of time and couldn't find any. A 5402 came up as a good deal and I jumped at the opportunity.

Question for all of you, on watches with a seconds hand I track timing using an app. Any recommendation on how to do the same/similar without a seconds hands? A loupe and looking exactly when it lines up with an hour marker?

Thanks!

[RolexZen]

You could use a timegrapher to determine accuracy in multiple positions.

Or you could set it to exactly hit the minute marker at the same time as an atomic clock, and then see how many days it takes to be exactly one minute off.

Or you could keep one eye on an atomic clock and another on your 5402 around midnight to determine the offset when the date flips. Then repeat that over X number of days. :-)

There was a guy on another site that said he could could estimate the accuracy of his Jumbo he was able to "eyeball the position of a minute hand quite accurately". I'm not as confident that I can do that, but I guess you might be able to tell if it was around half a minute off after 24 hours.

[Ku5165]

This was what I was thinking. Set it "correct" time as close as possible and then monitor how many days before it is off by a minute and then average it out. I just want an indication of when service may be due.

Originally Posted by RolexZen

You could use a timegrapher to determine accuracy in multiple positions.

Or you could set it to exactly hit the minute marker at the same time as an atomic clock, and then see how many days it takes to be exactly one minute off.

Or you could keep one eye on an atomic clock and another on your 5402 around midnight to determine the offset when the date flips. Then repeat that over X number of days. :-)

There was a guy on another site that said he could could estimate the accuracy of his Jumbo he was able to "eyeball the position of a minute hand quite accurately". I'm not as confident that I can do that, but I guess you might be able to tell if it was around half a minute off after 24 hours.