Patek Philippe Annual Calendar Advanced Research 5350

Advanced Research, Reference 5350 A limited edition pink gold annual calendar wristwatch with silicon escape wheel, Silinvar Spiromax balance spring, moon phases and power reserve indication, in double factory seal, Circa 2009 | 百達翡麗 | ADVANCED RESEARCH 型號5350 | 限量版粉紅金年曆腕錶，備矽製擒縱齒輪、SPIROMAX擺輪游絲、月相及動力儲存顯示，原廠未開封，約2009年製 Patek Philippe

Patek Philippe Advanced Research, Reference 5350 A limited edition pink gold annual calendar wristwatch with silicon escape wheel, Silinvar Spiromax balance spring, moon phases and power reserve indication, in double factory seal, Circa 2009 百達翡麗 ADVANCED RESEARCH 型號5350 限量版粉紅金年曆腕錶，備矽製擒縱齒輪、SPIROMAX擺輪游絲、月相及動力儲存顯示，原廠未開封，約2009年製 Dial: silvered Calibre: cal. 324 automatic, 36 jewels Movement number: 3'686'124 Case: 18k pink gold, screw down sapphire crystal display back Case number: 4'370'647 Closure: brown Patek Philippe alligator strap and 18k pink gold folding clasp Size: 39 mm diameter Signed: case, dial and movement Accessories: Patek Philippe Certificate of Origin, instruction manual and presentation box 附帶證書、說明書及盒子Patek Philippe's Advanced Research team strive to improve the isochronism of mechanical watches employing cutting-edge materials in their pioneering annual calendar in-house movements. Technical advances are introduced to improve long-term functional integrity. Launched in 2006 and produced in a limited edition of 300 pieces only, the reference 5350 is fitted with an upgrade movement that carries silicon escape wheel and Silinvar Spiromax balance spring. This innovative components contributes to the higher rate accuracy and reliability of timepieces.