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      01-30-2018, 09:07 AM   #22
hooligan_G01
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Quote:
Originally Posted by KMORGSM5 View Post
Thanks! Found out it has Movement: Calibre 89365 with 68hr power reserve.

And apparently the reason why the second hand hacks and isn't as smooth as the Rolex " hacking seconds function harks back to an era when military use necessitated the synchronization of watches."
The smoothness of the seconds hand sweep is dependent completely on the VPH (vibrations per hour), also known as "beat rate".

https://www.watchtime.com/reference-...vibration-vph/

"Hacking" seconds refers to the second hand stopping when the stem is pulled out to the time-set position. Many mechanical movements don't have hacking seconds.
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