Skip to content
The Encyclopedia of Horology

Wristwatch · Annual calendar wristwatch

Patek Philippe Nautilus Annual Calendar Ref. 5726/1A-001

Partially verified

This Patek Philippe Nautilus Annual Calendar reference 5726/1A-001 is a stainless steel automatic wristwatch stated to have been manufactured in 2013. The watch features a 40.5mm rounded octagonal stainless steel case paired with an integrated stainless steel bracelet. Its horizontally embossed grey dial displays day and month apertures beneath the 12 o'clock maker signature, a combination 24-hour indicator and moon phase display at 6 o'clock, and a date window at the bottom. The auction catalog reports that the self-winding movement operates the annual calendar complication, and the piece is presented in pre-owned very good condition accompanied by its original box and papers.

Front three-quarter view of the Patek Philippe Nautilus Annual Calendar ref. 5726/1A-001 on a display stand
Front three-quarter view of the Patek Philippe Nautilus Annual Calendar ref. 5726/1A-001 on a display stand — Serenity Gallerie. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.liveauctioneers.com
Category
Wristwatch · Annual calendar wristwatch
Maker / attribution
Patek Philippe
Reference
5726/1A-001
Catalogue / lot identifier
0230
Source-reported date
2013
Country
Switzerland

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Identity and Case Construction

The catalog records this timepiece as a Patek Philippe Nautilus Annual Calendar, reference 5726/1A-001, stated to have been manufactured in 2013. The case is constructed from stainless steel with a rounded octagonal bezel framing the dial. The seller states the case measures 40.5mm across and is paired with an integrated stainless steel bracelet fitted with a folding clasp, reportedly accommodating wrist sizes up to 7 3/4 inches.

The lot specifications list an overall weight of 150 grams and a reported water resistance rating of 10 meters (1 ATM). The clasp and case back are not pictured in the provided catalog imagery.

Evidence for this section
  • “Patek Philippe Nautilus Annual Calendar, Reference 5726/1A-001”
  • “Crafted in resilient stainless steel , its signature rounded octagonal case features a stunning, horizontally embossed grey dial”
  • “Case Size: 40.5mm”
  • “Wrist Size: 7 3/4 inch”
  • “Weight: 150g”
  • “Water Resistance: 10 Meters / 1 ATM”

Dial Architecture and Calendar Display

The dial features a horizontally embossed grey finish with luminous applied hour markers and baton hands. Calendar indications are arranged symmetrically, showing two rectangular apertures below the upper dial text for the day of the week ('TUE') and the month ('JAN').

Positioned at 6 o'clock is an integrated subdial displaying a 24-hour scale and a moon phase disc, positioned directly above a rectangular date window reading '6'.

Evidence for this section
  • “Horizontally embossed grey dial with luminous applied hour markers and baton hands.”
  • “Dual apertures showing day ('TUE') and month ('JAN') beneath the maker signature.”
  • “Integrated subdial at 6 o'clock displaying 24-hour markings and moon phase disc, set directly above a rectangular date window displaying '6'.”
  • “Features: 12-Hour Dial, Date, Day, Month, Annual Calendar, Moon Phase”

Reported Movement and Documentation Limitations

The catalog description reports that the watch contains an automatic self-winding movement supporting its annual calendar and moon phase complications. However, no photographs of the movement or internal components are included in the listing, leaving caliber designations, movement serial numbers, and mechanical condition unverified.

Additionally, while the seller lists box and papers as present and indicates that a Certificate of Authenticity is available upon request, neither the packaging nor documentation is shown in the listing photos. The condition disclaimer further notes that select images may be digitally enhanced or staged.

Evidence for this section
  • “At its heart beats a prestigious self-winding automatic movement, offering exceptional reliability for its annual calendar and moon phase functions.”
  • “Box Papers: Yes/Yes”
  • “Certificate of Authenticity is available upon request.”
  • “select images may be digitally enhanced or staged to demonstrate potential use cases.”

Open research questions

  • What specific caliber number and movement serial number are stamped on the movement?
  • Do the stated original papers match the reference and serial number of this specific watch and confirm the 2013 production year?
  • Does the bracelet retain all factory links to reach the cataloged 7 3/4-inch wrist size?

Source evidence

Recorded claims and source quotations for Patek Philippe Nautilus Annual Calendar Ref. 5726/1A-001
FieldSource-reported valueSource quotation
Reference5726/1A-001“Model Number: 5726/1A-001”
Case Size40.5mm“Case Size: 40.5mm”
Case MaterialStainless Steel“Case Material: Stainless Steel”
Dial ColorGrey“Dial Color: Grey”
Year of Manufacture2013“Year of Manufacture: 2013”
MovementAutomatic“Movement: Automatic”
Bracelet MaterialStainless Steel“Bracelet Material: Stainless Steel”
Total Weight150g“Weight: 150g”
Reported Water Resistance10 Meters / 1 ATM“Water Resistance: 10 Meters / 1 ATM”
Wrist Size FitUp to 7 3/4 inches“providing an ultra-comfortable fit for wrist sizes up to 7 3/4 inches.”

Visible details

  • Horizontally embossed grey dial with luminous applied hour markers and baton hands.
  • Dual apertures showing day ('TUE') and month ('JAN') beneath the maker signature.
  • Integrated subdial at 6 o'clock displaying 24-hour markings and moon phase disc, set directly above a rectangular date window displaying '6'.

Research qualifications

  • No photographs of the movement, case back, clasp, or accompanying box and papers are provided.
  • The source notes that select imagery may be digitally enhanced or staged.

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

Patek Philippe Nautilus Annual Calendar 5726/1a-001 Stainless Steel Grey Dial - Aug 9, 2026 | Serenity Gallerie In Fl

Reviewed 2026-10-21 · Record 2bbb02be30

Terms in this record

Glossary explanations for terms named in this object’s record.

Other annual calendar wristwatch records