The Patek Philippe 4960 is the ladies version of the increasingly popular Aquanaut. The Aquanaut model was first introduced in 1997, just one year before the 4960 was released. This smaller, steel sport watch features a quartz calibre E19C movement and is quite rare to find. Even more rare are examples like this one with a blue dial, which was offered in a highly limited edition issued to the Japanese market in 1998. Fewer than a handful of these examples have ever reached the market, making this one a special opportunity.