The perpetual calendar is fully programmed at IWC. If you need to reset it, you do so using the crown alone. To move the date forward, you pull the crown out to its first position and turn it clockwise. At the end of the month, you must also advance the month. In doing so, you must be careful not to turn the crown too far, because then you will have to either advance the months through the entire four-year cycle to return to the correct month, or allow the incorrect numeral to remain in place for the duration of the month. While the chronograph pushers operate smoothly, the crown is more difficult to handle. It is screwed down despite the case’s relatively low water-resistance of 30 meters.
The Da Vinci is an elegant and impressive watch. The hefty, complex gold case and elaborate dial contribute to the price of $44,300.* And although the strap might have benefited from a bit more attention to detail, it allows this large watch to lie quite comfortably on the wrist.
The caseback window reveals the shock-absorbing rotor bridge of this manufacture movement. The chronograph works with a column wheel and rocking pinion. Fine regulation is accomplished with regulating screws on the balance. IWC decorates the movement with circular finishes and perlage but leaves the edges untouched.
Functions: Hours, minutes, seconds; flyback chronograph with counters for minutes and hours; perpetual calendar with large date, large month and leap-year display
Movement: Cal. 89800, automatic; 28,800 vph; fine regulating system with balance weights; power reserve = 68 hours
Case: Rose gold, sapphire crystal with nonreflective coating on both sides, eight screws fastening the caseback with sapphire window; water-resistant to 30 meters
(*Prices are circa December 2010 and are subject to change.)