I’ve just fully wound the watch and am following the accuracy, it’s Acoustic resonance, unlike the FP Journe or Armin Strom with two second hand counters that sync together, the VH only has one secondhand. In the VH the side crystal at 3 o’clock shows where the two oscillators sink together or opposite each other depending on how the watch starts when first wound. Besides accuracy, I’m not quite sure how to tell if the resonance is working properly yet…Jim