Patek Philippe Nautilus Annual Calendar Moonphase 40mm Rose Gold Self-winding

The Patek Philippe Nautilus Ref. 5712/1R-001 represents annual calendar complications in rose gold with moon phase integration. This 40mm timepiece features brown dial displaying day, date, and month via subdials. Moon phase positioned at 6 o'clock recreates lunar cycle. Manufacture Caliber 240 PS IRM C LU ultra-thin automatic movement delivers 48 hours autonomy. Power reserve indicator at 12 o'clock displays remaining autonomy. Rose gold integrated bracelet maintains Nautilus horizontal embossing. Water resistance to 120 meters enables active lifestyle wear.

Reference 5712 introduced 2006 brought annual calendar and moon phase to Nautilus lineup creating complications alternative. Caliber 240 PS IRM C LU evolved from ultra-thin 240 base with annual calendar module, power reserve, and moon phase addition. Movement measures 5.78mm thickness enabling slim 11.01mm case profile. Annual calendar displays day and month via subdials at 10 and 2 o'clock. Date appears in window at 4 o'clock. Moon phase uses 122-tooth gear providing accuracy deviation of one day every 122 years. Power reserve arc at 12 o'clock indicates remaining hours from full wind.

Brown dial features horizontal embossed pattern with applied rose gold hour markers. Integrated bracelet in 18k rose gold features multiple links with polished and brushed finishing. Fold-over clasp ensures secure attachment. Sapphire exhibition caseback reveals ultra-thin movement architecture. This preowned example represents discontinued first-generation 5712 before 2019 update. Collectors value original brown dial configuration with rose gold construction. Annual calendar and moon phase complications appeal to buyers seeking functionality beyond time-and-date simplicity. Rose gold Nautilus commands premium positioning combining sports watch aesthetics with precious metal construction and manufacture complications creating highly sought complications variant.