Patek Philippe. A Fine and Rare 18k Gold Perpetual Calendar Chronograph Wristwatch with Moon Phases, Gold-Colored Dial, and Original CertificateSigned Patek Philippe, Genève, Ref. 5970, Movement No. 3'049'183, Case No. 4'458'268, Circa 2011Cal. CH 27-70 Q mechanical movement, stamped with the Geneva Seal, 24 jewels, gold-colored dial, applied dot and Roman numeral twelve, outer railway minute divisions and tachometer scale, two apertures for day and month in English, three subsidiary dials for leap year indication combined with 30 minute register, constant seconds combined with 12 hour register, and date combined with moon phases, circular water-resistant-type case, downturned fluted lugs, two rectangular chronograph buttons in the band, sapphire crystal display screw back, 18k gold Patek Philippe deployant clasp, case, dial, and movement signed40mm diam.