Executed in 18k rose gold, this reference carries the same annual calendar architecture with an elevated material presence. The dial incorporates day and month apertures, date display, moon phase, and 24 hour indicator, all powered by an automatic movement engineered for reliability. The rose gold case enhances the visual depth of the dial, while the integrated bracelet ensures both comfort and continuity in design. The sapphire crystal case back reveals the detailed finishing of the movement components.

This model introduces a more expressive interpretation of the Nautilus calendar line. It blends mechanical utility with a richer aesthetic, appealing to collectors who prioritize both craftsmanship and visual impact in a single timepiece.

Patek Philippe Nautilus 5726/1R-001

Reference: 5726/1R-001
Collection: Nautilus
Complications: Annual Calendar and Moon Phases
Case Material: 18K rose gold
Case Shape: Porthole-inspired Nautilus construction
Dial: Brown sunburst / brown-gradient execution
Strap: Alligator leather
Clasp: Rose-gold Patek Philippe folding clasp
Configuration: Rose-gold case on leather strap.

Movement

The 5726/1R-001 is documented by secondary-market reference records as an Annual Calendar and Moon Phases Nautilus, with the same fundamental 5726 complication architecture. However, I want to maintain the sourcing distinction here: Patek Philippe’s current official catalogue does not list 5726/1R-001 as an active or discontinued reference, whereas it officially lists 5726/1A-014 and 5726A-001.

Consequently, I would not present a detailed calibre specification for 5726/1R-001 as factory-confirmed without an original Patek Philippe Extract, technical sheet, or other primary documentation tied specifically to this reference.

Documented Secondary-Market Configuration

Case: 18K rose gold
Dial: Brown
Strap: Leather/alligator
Complications: Annual Calendar and Moon Phases
Reference family: 5726 Nautilus.

Reference Verification Note

This is an important distinction for your catalogue:

Patek Philippe’s official documentation confirms the 5726 Annual Calendar/Moon Phases family, and the officially documented steel-bracelet reference is 5726/1A-014, while 5726A-001 is the steel/leather configuration.

The 5726/1R-001 appears in specialist secondary-market cataloguing as an 18K rose-gold, brown-dial, leather-strap configuration, but I have not found sufficient primary Patek Philippe documentation to label that reference as officially authenticated.