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

Technical characteristics

Size

45 mm diameter

Type

Perpetual calendar tourbillon wristwatch

Calibre

cal. 581 DPE automatic, 57 jewels

Reference

5887PT/Y2/9WV

Case number

1'041 BU

Case material

Platinum

Place recorded

Switzerland

Movement number

31'120

Maker / attribution

Breguet

Design

Visible features

• 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

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.'

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.

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'.

Identification

Reference

5887PT/Y2/9WV

Serial number

1'041 BU

Source note

Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.

Catalogue references

No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.