Patek published the Nautilus 5711, available in steel and rose gold, in 2006 to celebrate the collection’s 30th anniversary. As an all-stainless steel model with time and date windows, Nautilus 5711/1a is the closest contemporary to the original reference. It is also the most popular model of the nautilus, often considered the hottest cheap luxury watch on the market today.
To get your hands on a Nautilus ref. 5711/1A needs either waiting for years for one to become available at an authorized retailer or a willingness to pay more than double the retail price in the secondary market. For fans of pink valuable metal, there’s the full rose gold version, the Nautilus 5711/1R too. 
The Nautilus 5711 features a 40mm case (around 8.3mm thick) that is water-resistant to 120 meters. In real Nautilus fashion, the ref. 5711 is paired with an integrated bracelet, equipped with a fold-over clasp. The steel 5711/1A comes with an option of a blue dial or a white dial while the rose gold 5711/1R consists of a chocolate brown dial, all complete with horizontal embossing.
Patek also launched the Nautilus 5712 in 2006, which consists of a moonphase display, running seconds sub-dial, date display, and power reserve indicator. Similar to the 5711, the Nautilus Moonphase sports a 40mm case. However, Patek makes the ref. 5712 in three metal options – steel, rose gold, and white gold. Besides, while the steel Nautilus 5712/1A has a steel integrated bracelet, the rose gold 5712R and white gold 5712G have leather straps.
Inside the Nautilus Moonphase 5712 is the in-house Caliber 240 PS IRM C LU automatic movement, visible through the exhibition caseback, with a power reserve rating of 38 to 48 hours. The water resistance rating of the more sophisticated 5712 is half that of the simpler 5711 at 60 meters.
In 2010, Patek expanded its flagship sports watch collection by adding the Nautilus Annual Calendar ref. 5726. replica Patek Philippe developed and introduced an annual calendar complication in 1996 that adjusts the time and correct display of the calendar by automatically considering whether a month is 30 days or 31 days. The only time a calendar watch needs to be manually adjusted is March 1.
The 5726 is the first Nautilus watch to this practical Patek complex. In addition to the moonphase display and 24-hour display, the dial includes a window for the date, date, and month. Although the 40.5mm case is made of stainless steel, there are some variations in the color of the dial and the material of the strap. In the middle of the nautilus’s calendar was a Calibre of 324 S QA LU 24H, a reserve of 35 to 45 hours of power, and a water-proof depth of 120 meters.