Patek Philippe Nautilus Annual Calendar Moonphase 5726/1A Nautilus Inspired by the process used

Inspired by the process used to string a tennis racket

and features a power-reserve indicator

Case material Yellow gold Case diameter 36 x 43 mm  Thickness 12 mm Water resistance 10 ATM Bezel material Yellow gold Crystal Sapphire crystal Bracelet/strap

highly corrosion-resistant and remarkably rigid alloy

The use of grade 5 titanium combined with a black PVD treatment lends the whole assembly great rigidity

Patek Philippe Nautilus Annual Calendar Moonphase 5726/1A Nautilus Inspired by the process usedCaliber Movement Automatic Caliber movement 324 S QA LU 24H Power reserve 45 h Number of jewels 34 Case Case material Steel Case diameter 40. 5 mm Water resistance 10 ATM Bezel material Steel Crystal Sapphire crystal Dial Blue Dial numerals No numerals Bracelet strap Bracelet material Steel Bracelet color Steel Clasp Fold clasp Clasp material Steel