Patek Philippe Perpetual Calendar Chronograph 3971ER

PATEK PHILIPPE. A VERY RARE 18K PINK GOLD PERPETUAL CALENDAR CHRONOGRAPH WRISTWATCH WITH MOON PHASES, 24 HOUR AND LEAP YEAR INDICATION REF. 3971ER, MOVEMENT NO. 875'480, CASE NO. 2'870'009

PATEK PHILIPPE. A VERY RARE 18K PINK GOLD PERPETUAL CALENDAR CHRONOGRAPH WRISTWATCH WITH MOON PHASES, 24 HOUR AND LEAP YEAR INDICATION REF. 3971ER, MOVEMENT NO. 875'480, CASE NO. 2'870'009 Movement: Manual Dial: Silvered Case: 36 mm. With: 18k pink gold Patek Philippe deployant clasp, presentation box and outer packaging Note: Please note that Christie’s has applied for an “Extract from the Archives” from Patek Philippe Archives but the Extract has not yet been issued and may not be available by the date of the auction. The lot is sold “as is” without any Extract and Christie’s does not guarantee Patek Philippe Archives will issue the Extract. The presentation box that accompanies this lot may not be the original “fitted box”. Please refer to paragraph A in the Conditions of Sale for further information. If you have any queries, please contact Watch Department at watcheshk@christies.com. PATEK PHILIPPE. A VERY RARE 18K PINK GOLD PERPETUAL CALENDAR CHRONOGRAPH WRISTWATCH WITH MOON PHASES, 24 HOUR AND LEAP YEAR INDICATION REF. 3971ER, MOVEMENT NO. 875'480, CASE NO. 2'870'009 Movement: Manual Dial: Silvered Case: 36 mm. With: 18k pink gold Patek Philippe deployant clasp, presentation box and outer packaging Note: Please note that Christie’s has applied for an “Extract from the Archives” from Patek Philippe Archives but the Extract has not yet been issued and may not be available by the date of the auction. The lot is sold “as is” without any Extract and Christie’s does not guarantee Patek Philippe Archives will issue the Extract. The presentation box that accompanies this lot may not be the original “fitted box”. Please refer to paragraph A in the Conditions of Sale for further information. If you have any queries, please contact Watch Department at watcheshk@christies.com.In 1986, Patek Philippe launched a new generation of the perpetual calendar chronograph wristwatch, designated reference 3970 and much rarer reference 3971, replacing the hugely successful reference 2499. The main difference in the movement was the arrival of the new Lemania base ébauche which replaced the Valjoux movement used for the previous 50 years. Only a small number of reference 3971 are available as it was soon discontinued in 1990, when the third series of reference 3970 was launched with a spare crystal case back. Reference 3971 is illustrated in: Patek Philippe Museum - Patek Philippe Watches, Vol. II, p. 307.