Digital Pallweber Display
For the IWC-manufactured 94200 calibre, a new solution for the digital hours and minutes display was developed. While toothed cogs moved the discs in the historical pocket watches, the impulse that advances the single-minute disc is now supplied by a separate wheel train with a barrel of its own. A release mechanism that establishes a connection to the watch’s main wheel train unlocks the train every 60 seconds and then immediately locks it again. After 10 minutes, the single-minute disc moves the 10-minute disc forward by one position. Every 60th minute, the hour ring jumps to the next numeral. The fact that the flow of power in the main wheel train is uninfluenced by this separate wheel train guarantees a precise rate and a 60-hour power reserve. As in the historical Pallweber watches, the discs are connected through a Maltese cross drive and can easily be moved forward or backward using the crown.