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The Encyclopedia of Horology

Wristwatch · Perpetual calendar tourbillon wristwatch

Breguet Marine Tourbillon Équation Marchante, Reference 5887PT/Y2/9WV

Partially verified

This Breguet Marine Tourbillon Équation Marchante is a platinum perpetual calendar tourbillon wristwatch dating to circa 2022. It features a blue wave-pattern guilloché dial with Roman numerals, retrograde date arc, day and month apertures, and a running equation of time indicated by a secondary solar minute hand. The source reports that it is powered by the automatic calibre 581 DPE with 57 jewels and a peripheral winding system, incorporating a one-minute tourbillon visible between 4 and 6 o'clock. The platinum case is listed as 45 mm in diameter with a sapphire crystal display case back secured by seven screws and mounted on a black leather strap.

Three-quarter front view of the platinum Breguet Marine Tourbillon Équation Marchante wristwatch on a black strap
Three-quarter front view of the platinum Breguet Marine Tourbillon Équation Marchante wristwatch on a black strap — Sotheby's. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.sothebys.com
Category
Wristwatch · Perpetual calendar tourbillon wristwatch
Maker / attribution
Breguet
Reference
5887PT/Y2/9WV
Catalogue / lot identifier
204
Source-reported date
Circa 2022
Country
Switzerland
Source-reported serial
1'041 BU

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

Dial Design and Astronomical Indications

The timepiece features a blue wave-pattern guilloché dial with silvered chapter rings and several calendar and astronomical indications. Directly visible across the upper section is a retrograde date arc accompanied by day and month apertures. The lower portion between 4 and 6 o'clock displays the tourbillon carriage, beneath which the dial is marked with 'BREGUET' and 'N° 1041'.

Time is shown with faceted Breguet hands alongside a secondary running equation minute hand terminating in a circular sun motif. The auction cataloguer notes that this mechanism functions as a running equation of time, stating that 'a secondary minute hand, adorned with a gilded Sun, indicates the difference between mean solar time and true solar time in real-time', operating via 'a cam shaped like the analemma curve, symbolizing the Sun's position relative to the Earth, and a sophisticated differential mechanism.'

Evidence for this section
  • “Blue textured guilloché dial with wave motifs and silvered chapter rings”
  • “Dial marked 'BREGUET' at 6 o'clock and individual number 'N° 1041' below the tourbillon”
  • “a secondary minute hand, adorned with a gilded Sun, indicates the difference between mean solar time and true solar time in real-time”
  • “a cam shaped like the analemma curve, symbolizing the Sun's position relative to the Earth, and a sophisticated differential mechanism.”

Case Construction and Dimensional Discrepancy

The case is executed in platinum, exhibiting a fluted caseband, stepped lugs, and an alligator-pattern black leather strap. The lot specifications report a 'sapphire crystal display case back secured by 7 screws' and a 'platinum Breguet double-folding clasp', though neither the case back nor the folding clasp is visible in the provided image view.

The auction source presents an internal discrepancy regarding the case diameter. In the structured lot details, the size is stated as 'Size: 45 mm diameter', while the accompanying catalogue narrative refers to it as a '44 mm case'.

Evidence for this section
  • “Fluted caseband with stepped lugs and black leather alligator-pattern strap”
  • “Case: platinum, sapphire crystal display case back secured by 7 screws”
  • “Closure: platinum Breguet double-folding clasp”
  • “Size: 45 mm diameter”
  • “The 44 mm case, Super-Luminova accents, and engraved nautical motifs complete the modern and nautical aesthetic”

Reported Movement and Presentation Status

The movement is documented by the auction house as the automatic 'cal. 581 DPE automatic, 57 jewels', with movement number '31'120'. The catalogue note adds that the calibre features a 'peripheral winding mechanism' and a 'one-minute tourbillon', noting that the watch is also equipped with a perpetual calendar and a power reserve indicator.

Dating to 'Circa 2022', the lot is listed with 'Box: yes' and 'Papers: no', and was accompanied by a 'Breguet presentation case with outer packaging'. The movement itself and its internal numbering are not visible in the provided image.

Evidence for this section
  • “Calibre: cal. 581 DPE automatic, 57 jewels”
  • “Movement number: 31'120”
  • “Circa 2022”
  • “Box: yes”
  • “Papers: no”
  • “Accessories: Breguet presentation case with outer packaging”

Open research questions

  • What explains the discrepancy between the structured 45 mm diameter specification and the 44 mm measurement stated in the catalogue note?
  • What specific engravings and naval motifs appear on the movement plates visible through the sapphire display back?
  • Can the circa 2022 dating be confirmed through Breguet archive records for movement number 31'120 and case number 1'041 BU?

Source evidence

Recorded claims and source quotations for Breguet Marine Tourbillon Équation Marchante, Reference 5887PT/Y2/9WV
FieldSource-reported valueSource quotation
Reference5887PT/Y2/9WV“Reference 5887PT/Y2/9WV”
Calibrecal. 581 DPE automatic, 57 jewels“Calibre: cal. 581 DPE automatic, 57 jewels”
Movement number31'120“Movement number: 31'120”
Case number1'041 BU“Case number: 1'041 BU”
Case materialPlatinum“Case: platinum, sapphire crystal display case back secured by 7 screws”
Size45 mm diameter“Size: 45 mm diameter”
ClosurePlatinum Breguet double-folding clasp“Closure: platinum Breguet double-folding clasp”
AccessoriesBreguet presentation case with outer packaging“Accessories: Breguet presentation case with outer packaging”
BoxYes“Box: yes”
PapersNo“Papers: no”

Visible details

  • Blue textured guilloché dial with wave motifs and silvered chapter rings
  • Tourbillon carriage visible at the lower portion between 4 and 6 o'clock
  • Faceted Breguet hands accompanied by a running equation minute hand terminating in a circular sun motif
  • Fluted caseband with stepped lugs and black leather alligator-pattern strap
  • Retrograde date display across the upper central sector with day and month apertures
  • Dial marked 'BREGUET' at 6 o'clock and individual number 'N° 1041' below the tourbillon

Research qualifications

  • Source notes conflicting case diameter in the text (45 mm in specifications versus 44 mm in the catalogue note)
  • Display case back, movement, and platinum double-folding clasp are not visible in the provided image view

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

Consulted source

Breguet | Marine Tourbillon Equation Marchante, Reference

Reviewed 2026-10-21 · Record 36bf9ade0a

Terms in this record

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