82665

The IWC-manufactured 82665 calibre is an automatic movement serving as the foundation for the Perpetual Calendar IWC-ProSet system, designed for simple adjustment and lasting mechanical accuracy. Operating at 28,800 vibrations per hour with a 60-hour power reserve, it tracks the date, day, month, four-digit year, dual-hemisphere moon phase, and small hacking seconds, utilizing the Pellaton automatic winding system. The ProSet mechanism features a fully synchronized, gear-driven design that enables bidirectional calendar adjustments via the crown, utilizing LIGA-produced layered components for precise daily corrections and enhanced moon phase accuracy of one day every 1,040 years.