Quote:
Originally Posted by KMORGSM5
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."
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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.