IWC Ingenieur Constant Force Tourbillon is what it says on the cover Рand, in fact, quite a bit more. The tourbillon, as you may have seen in the video of the $750,000 Portuguese Sid̩rale Scafusia, has a "dead-beat" ticking motion to it, advancing once every second Рlike a normal seconds hand on most quartz watches. What's responsible for that is the patented constant-force mechanism that ensures that the amplitude of the balance, and hence, timekeeping accuracy remain consistent. Here we could see the replica IWC Ingenieur watches.
On the note of extreme precision, I have not given up hoping that someday we get to frequently see exact rate results backing up these claims – not that I have any doubts in the movement's accuracy, but rather I wonder just how extremely accurate it is. Once those two days have passed, the movement switches to "normal mode," when the tourbillon advances not once, but 5 times every second.
On the note of extreme precision, I have not given up hoping that someday we get to frequently see exact rate results backing up these claims – not that I have any doubts in the movement's accuracy, but rather I wonder just how extremely accurate it is. Once those two days have passed, the movement switches to "normal mode," when the tourbillon advances not once, but 5 times every second.
The possible reason for that, although IWC does not elaborate on this, is that once 48 hours have passed, the two barrels do not have sufficient torque to wind up the constant force mechanism's little spring (which provides the extra oomph and ensures constant, well, force). Consequently, the next 48 hours is spent in normal, 2.5 Hertz "mode."
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