Patek Philippe Nautilus - A Gentleman's Moon Phase Stainless Steel Chronometer Wristwatch the model No: 5712/1A, with the rounded octagonal 40 x 38mm case, horizontally embossed black/blue dial with luminous baton numerals, with seconds/days/moonphase and power reserve subdials, self-winding mechanical caliber 240 PS IRM C LU movement, screw-down crown, sapphire-crystal case back, water-resistant: 60 m, diameter (10–4 o’clock): 40mm, height: 8.52 mm, steel bracelet, Nautilus fold-over clasp, box & papers. The Nautilus has epitomized the elegant sports watch since 1976. Forty years later, it comprises a splendid and highly desirable collection of models for men and women. In steel, rose gold, white gold or two-tone combinations they accompany the most active lifestyles with incomparable class.