Overview
Master the complexities of time with the Patek Philippe Nautilus Reference 5726A-001. This masterpiece of horology represents a significant milestone in the Nautilus collection, being the first to feature the brand’s legendary Annual Calendar complication. Paired with a sophisticated matte black dial and a hand-stitched alligator strap, the 5726/1A-001 offers a more formal and understated aesthetic than its integrated bracelet counterparts. Following its discontinuation in early 2021, this reference has become a high-priority acquisition for collectors who value Patek Philippe’s technical ingenuity within the iconic, porthole-inspired framework of the Nautilus.

A Dial of Balanced Complexity
The matte black dial is a study in functional elegance and symmetry. Featuring the signature horizontal Nautilus embossing, the dial layout is meticulously organized to provide clear legibility of its multiple complications. It hosts twin apertures for the day and month at 12 o’clock, a date window at 6 o’clock, and a sophisticated moon phase display integrated with a 24-hour indicator at the 6 o’clock position. The applied hour markers and hands are crafted from white gold and filled with a luminescent coating, ensuring that this complex calendar remains perfectly readable in all lighting conditions.

Refined Stainless Steel & Leather Craftsmanship
The 40.5mm stainless steel case is a marvel of architectural integration, maintaining the iconic Nautilus silhouette while accommodating the sophisticated calendar movement. The case features the signature rounded octagonal bezel with a masterfully executed blend of vertical satin-brushing and mirror-polished bevels. Unlike the bracelet models, the 5726/1A-001 is presented on a matte black alligator leather strap (or a composite strap), providing a softer, more versatile character. The strap is equipped with a stainless steel Nautilus fold-over clasp, ensuring both security and a cohesive aesthetic for the modern gentleman.

Mechanical Mastery: Calibre 324 S QA LU 24H/303
At the heart of this technical powerhouse is the Calibre 324 S QA LU 24H/303. This self-winding movement is a testament to Patek Philippe’s mechanical expertise, featuring an annual calendar mechanism that only requires a single manual adjustment per year (at the end of February). Visible through the sapphire crystal case back, the movement features a 21k gold central rotor and the Patek Philippe Seal, guaranteeing a level of precision and finishing that is second to none. With its complex array of calendar wheels and moon phase indicators, this caliber is a true horological marvel.

Authenticity & Rarity at Cest Watches
At Cest Watches, we are dedicated to providing the most authentic luxury timepieces in NYC. This discontinued Patek Philippe 5726/1A-001 is offered in pristine condition as a full set, including the original Patek Philippe box, certificate of origin, and all accompanying manuals. Visit our luxury boutique at 10 West 46th St, New York to experience the unrivaled functionality and presence of this stainless steel Annual Calendar in the heart of the Midtown Manhattan Diamond District.

Technical Specifications
Brand    Patek Philippe
Model    Nautilus Annual Calendar
Reference    5726/1A-001 (Discontinued)
Condition    Pre-Owned / Excellent (Collector Grade)
Case Size    40.5mm
Thickness    11.3mm
Material    Stainless Steel
Dial    Matte Black w/ Horizontal Embossing
Complications    Annual Calendar (Day, Date, Month), Moon Phases, 24-Hour Indicator
Strap    Matte Black Alligator Leather w/ Stainless Steel Fold-over Clasp
Movement    Automatic Calibre 324 S QA LU 24H/303
Power Reserve    Approx. 45 Hours
Water Resistance    120m / 394ft
Inclusions    Full Set (Original Box, Papers, & Manuals)

Inquire Today
Own the definitive calendar complication from the Nautilus collection. Contact Cest Watches today to inquire about the discontinued Patek Philippe 5726/1A-001 or visit our New York City boutique for a private viewing and consultation.