IWC Pilot Chrono - Main Time and Stop Watch Time not in Sync

[chiasl]

Hi,

I have a one year old IWC Pilot Chrono bought new from local AD. I started the stop watch when the main time red seconds hand was at the 60 mark. After about 7-8 hrs, I noticed the stop watch is about 10 seconds slower than the red seconds hand.

I never paid attention to it before. Anyone knows why this happened?

Thanks!

[pegasi]

Hmm...interesting. I guess such can happen when the two hands are moved by different wheels in the movement? Maybe some expert of the 7750 movement can enlighten us...

[manualwinding]

Hi,

I have a one year old IWC Pilot Chrono bought new from local AD. I started the stop watch when the main time red seconds hand was at the 60 mark. After about 7-8 hrs, I noticed the stop watch is about 10 seconds slower than the red seconds hand.

I never paid attention to it before. Anyone knows why this happened?

Thanks!

Is it running out of juice?

[chiasl]

Nope. Fully wind up.