Reference 3603 houses the Beta 21 movement that was revolutionary at the time. It was used by many other brands to power their quartz watches. This watch was a huge step in a different direction for Patek Philippe and remained the largest watch they made until the 21st century. This is an early example of the reference as the 3603 was produced from 1973 to 1982.

Furthermore, this example is extremely rare as it is a white gold example on leather bracelet as confirmed by its archive. To date, there are less than fifteen examples in white gold on leather bracelet that have come to market.
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Φ Please note the endangered species strap is shown for display purposes only and is not for sale. Upon sale, this watch will be supplied to the buyer with a non CITES strap (not shown). The endangered species strap may be available for collection from the Christie’s New York saleroom – please contact Christie’s Client Service Center at watchesonline@christies.com.
For further information please refer to the Conditions of Sale.