IWC Perpetual Calendar Service & Adjustment Guide

Key Points from the Discussion

• The IWC Perpetual Calendar's design, particularly the module, was created by Kurt Klaus around 1985. One owner noted that their 'year' display once jumped an extra year between December and January during a manual setting, leading them to always wear the watch over year-end and February-end to avoid similar issues.
• Another owner reported experiencing the exact same issue with their IWC Perpetual Calendar at the same time as the original poster, suggesting a potential commonality in the fault. They planned to take it to their Authorized Dealer, hoping for a fix without sending it back to Schaffhausen.
• A contributor expressed interest in the underlying cause of the error, noting they had never encountered such a problem with their IWC Da Vinci Perpetual Calendars (first and second generation), which they wore daily for years without issue.
• The simultaneous occurrence of the same error in two different IWC Perpetual Calendars led one member to speculate if the recent March 1st date change could have caused the day display to over-jump.
• One contributor shared their service experience for a similar issue, noting it was 'a tad expensive' at about 10% of the purchase price, but the staff was excellent, and the watch was away for approximately one month. They also took the opportunity to have a scratch polished out.
• A contributor highlighted the reliability of other perpetual calendar watches, specifically mentioning a Longines model, suggesting that while IWC is great, such an error must be repaired.