Speedmaster Professional Resting Position Time Regulation

[KeepTicking]

Hi guys,

I played around with my speedy pro and tested its timekeeping precision based on resting position. For anyone looking to speed up or slow down your speedy, I figured this could be helpful.

My testing methodology: The watch was fully wound and then timed against the Time.gov atomic clock at exactly 12:00 pm each day. The watch was then left to rest in the given position below, untouched, for exactly 24 hours until 12:00 pm the following day when I timed it against Time.gov again. This was done for three days in each position, with the watch being fully wound before each subsequent timing. It is important to note that the timing was exactly the same for all three positions on each of the three days (very accurate movement). Below are my results.

Dial up: + 2 seconds
Dian down: - 4.5 seconds
Crown up: + 12 seconds
Crown down: + 4 seconds

Hopefully this is helpful for anyone trying to self regulate their speedy pro!!!

[sensui]

Thanks, I find consistent similar data when measuring my FOIS couple weeks back also. It's good to know to control your watch during the rotation to be as accurate as possible.

[RW16610]

Thanks for sharing those results, Brian.