Koller View 2/20

14 Preview of the Watch auction on 2 July 2020 Year-round precision FOR FURTHER INFORMATION WATCHES Uwe Vischer vischer@kollerauctions.com ONLINE CATALOGUES www.kollerauctions.com Patek Philippe “Nautilus annual calendar”. 2012. Stainless steel. Estimate: CHF 50 000/90 000 ThisNautilus from2012with its annual calendar andmoon phase is very rare. Rolex “Sea Dweller”. 2004. Stainless steel. Estimate: CHF 4 000/7 000 Rolex is the leading supplier of rugged marine watches that aremanufactured for use in extreme conditions, such as deep-sea diving. IWC “Grande Complication”. 1991. Platinum. Estimate: CHF 40 000/ 70 000 Those who do not have the luxury of a perpetual calen- dar on their wristwatch will appreciate the convenience of an annual calendar. In movements equipped with this practical feature, the analogue date display – un- like conventional models with simple date mechanisms Audemars Piguet “Royal Oak”. 2008. Stainless steel/ platinum. Estimate: CHF 25 000/45 000 The perpetual calendar and the moon phase lend the dial of the Royal Oak a striking appearance. – does not require any manual correction. The length of each month is displayed correctly; only at the end of February does it need to be changed manually to 1 March. Afterwards, the timepiece is again on the right course for an entire year. Patek Philippe “X-Leap Year”. Circa 1990. Yellow gold. Estimate: CHF 20 000/40 000