within the massive 42.2mm 18K gold or platinum case of the IWC Grande Complication watch, an exceptional and complex selfwinding movement with 659 individual parts performs an incredible symphony of functions, including a perpetual calendar which indicates day, date, month, century and moonphase, a chronograph, and a minute repeater. Due to the considerable demands placed upon the skills of the master IWC watchmakers in constructing the Grande Complication watch, only 50 are produced each year,guaranteeing the continued mystique of this most incredible of timepieces.