Lot Essay
The Grande Complication is one of IWC's most exclusive timepieces with production limited to just 50 watches a year. Consisting of 659 mechanical parts, 21 functions and displays, a perpetual calendar for the next 500 days and a perpetual moon phase display made of polished goldstone, this watch is a tour de force. The minute repeating chime is exceptional, as the sapphire crystal has been freely suspended on a platinum membrane, amplifying the gong vibrations via the sound transmission pin.