Patek Philippe Nautilus 5726/1A Blue DialThe Patek Philippe Nautilus 5726 1A is a striking evolution of the iconic Nautilus, combining sporty flair with high horology. Crafted in 40. 5 mm stainless steel, the case features the signature rounded octagonal bezel and alternating polished and satin finishesa nod to the 1976 original. Its embossed blue dial, graduating to black at the perimeter, houses a daymonth display beneath 12 o'clock, a moonphase and 24hour subdial at 6, plus a date