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1008. Patek Philippe A fne and very rare yellow gold perpetual calendar chronograph wristwatch with moon phases, 24 hours, leap year indicator, sapphire crystal case back, original certifcate and additional case back 百達翡麗，精細及非常罕有，18K黃金腕錶，配萬年曆、計時功能、月相、24小時及 閏年顯示，型號3971，附證書及底蓋，1989年製 Manufacturer Year
Patek Philippe 1989
Reference No. Movement No. Case No. Material Calibre
3971 875’400 2’856’537 18k yellow gold Mechanical, 27-70, 24 jewels 18k yellow gold Patek Philippe buckle 36 mm. diameter Case, dial and movement signed
Clasp/Buckle Dimensions Signed
Estimate
HKD 640,000-1,200,000 USD 80,000-150,000
Accessories With Patek Philippe Certifcate of Origin dated 26 October 1989, additional case back, product literature, instruction manual and leather wallet. Furthermore delivered with Patek Philippe Extract from the Archives confrming production of the present watch in 1989 and its subsequent sale on 4 September 1989.
Reference 3971, featuring a sapphire case back, was launched in 1986 alongside its sibling reference 3970. Early examples of reference 3971 featured sapphire snap on backs, rather than the traditional screw down case back. This particular example is in excellent condition, with strong futing to the lugs and the Patek Philippe case maker stamp, number 28 in the key Poinçon de Maître, punched to the side of the lug. This case maker mark, punched to the lug, is a defning feature of the rare reference. Most exceptional is the presence of the original certifcate and case back, further enhancing the present watch and its desirability.
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