Model: Perpetual Calendar ChronographReference: 3970EJCase Material: Yellow GoldBracelet Material: Leather StrapYear: 2002Movement: ManualCaliber: 27-70 QCase N°: 4 177 066Movement N°: 3046591Dimensions: 36 mmSigned: Dial, movement and caseAccessories: Box, Papers, Booklets, Solid Case Back and Setting PinConstantly in production until the present day, this dynasty of chronograph with perpetual calendar and moon phases was born in 1941 with the legendary 1518 replaced only a few years later by the equally iconic 2499 (in 1950). The 3970 and 3971 were introduced in 1986, and distinguished them from the previous model by the Lemania movement instead of Valjoux and the size that fell to 36 mm in diameter. When Patek Philippe first launched this new series of watches, the ref. 3970 was the model bearing a metallic back, while the ref. 3971 was equipped with a sapphire back. The yellow-gold case of the lot offered here is exceptional, equipped with a very elegant argentè dial with applied baton numbers andpleted by two windows for day and month are positioned slightly above the signature while the date surrounds the sundial with the fascinating moon phases display. An icon and a piece of history is offered here for true lovers and enthusiasts and, moreover, embellished with box, papers, solid case back and setting pin.Estimate € 65000 - 130000