Patek Philippe. A Fine Platinum Automatic Annual Calendar Flyback Chronograph Wristwatch with Power Reserve, Day and Night Indicator, Original Certificate and BoxSigned Patek Philippe, Genève, Ref. 5960, Movement No. 3'503'138, Case No. 4'438'498, Manufactured in 2008Cal. 28-520 automatic movement, stamped with the Geneva Seal, 40 jewels, anthracite brushed dial, applied baton numerals with luminous accents, three apertures for day, date, and month, large engine-turned subsidiary dial for 60 minutes and 12 hour registers combined with day and night indicator, small power reserve indicator at 12 o'clock, circular water-resistant-type case, two round chronograph buttons in the band, sapphire crystal display screw back, platinum Patek Philippe deployant clasp, case, dial, and movement signed40.5mm diam.