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The Encyclopedia of Horology

Wristwatch · Master Banker wristwatch

Franck Muller Cintrée Curvex Master Banker Ref. 5850 MB

Partially verified

This Franck Muller Master Banker wristwatch, identified by reference 5850 MB and dating to approximately 2000, features a distinctive tonneau-shaped, curved case constructed from 18K white gold. The timepiece houses a self-winding movement, specifically the Caliber 2800, which displays three distinct time zones. The silver-colored dial is decorated with guilloché engraving and incorporates painted Arabic numerals, an aperture for the date, and two subsidiary dials positioned at the 12 and 6 o'clock positions for the secondary time zones. Blued steel spade hands indicate the hours and minutes. The auction description notes the signature of the brand on the dial, case, and movement, and specifies that the piece is water-resistant. The total dimensions of the case are 31 x 43 mm with a thickness of 12 mm.

Front view of the 18K white gold Franck Muller Cintrée Curvex Master Banker Ref. 5850 MB.
Front view of the 18K white gold Franck Muller Cintrée Curvex Master Banker Ref. 5850 MB. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Wristwatch · Master Banker wristwatch
Maker / attribution
Franck Muller
Reference
5850 MB
Catalogue / lot identifier
150
Source-reported date
circa 2000
Source-reported place
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

Case and Dial

The case of this Franck Muller Master Banker is crafted in 18K white gold and follows the signature tonneau-shaped, curved aesthetic associated with the Cintrée Curvex line. The construction is solid, consisting of two pieces with a case back secured by four screws. The sapphire crystal protecting the dial is domed to accommodate the curvature of the case.

The dial is rendered in a silver finish featuring a guilloché pattern. It displays painted Arabic numerals and includes two subsidiary dials at the 12 and 6 o'clock positions, allowing for the independent adjustment of two additional time zones. An aperture for the date is also visible on the dial, which is completed by blued steel spade-style hands.

Evidence for this section
  • “tonneau-shaped and curved”
  • “Two-body, solid, polished, case back with 4 screws, domed sapphire crystal”
  • “silver with painted Arabic numerals, subsidiary dials at 12 and 6 for 2 additional individually adjustable time zones, aperture for the date. Blued steel”

Movement and Escapement

The watch is powered by the self-winding Caliber 2800. The movement is finished with rhodium plating and incorporates "fausses côtes" decoration. It features a straight-line lever escapement and operates with 21 jewels.

Functionality is managed through a monometallic balance that is adjusted to eight positions. Additional technical components include a shock absorber system, a self-compensating flat balance spring, and a micrometer regulator for precise timing adjustments.

Evidence for this section
  • “Cal. 2800, rhodium-plated, "fausses côtes" decoration, 21 jewels, straight-line lever escapement”
  • “monometallic balance adjusted to 8 positions, shock absorber, selfcompensating flat balance spring, micrometer regulator.”

Condition and Authenticity

The auction description reports an overall grade of AA for the timepiece. The dial is described as being in an 'as new' state. The case exhibits some light signs of use, specifically noted as scratches, and the original hands are intact.

The dial, case, and movement are all signed, which the source uses to confirm the authenticity of the components.

Evidence for this section
  • “Grading System Grade: AA Very good”
  • “Case: 3-9 Good Scratched”
  • “Movement: 3* Good Overhaul recommended, at buyer's expense”
  • “Dial, case and movement signed.”

Open research questions

  • What is the specific production serial number for this unit?
  • Does the accompanied certificate specify the original date of sale or retailer?

Source evidence

Recorded claims and source quotations for Franck Muller Cintrée Curvex Master Banker Ref. 5850 MB
FieldSource-reported valueSource quotation
MakerFranck Muller“Franck Muller, Genève”
Reference5850 MB“Ref. 5850 MB”
Case Material18K white gold“18K white gold”
MovementCaliber 2800“Cal. 2800”
Complications3 time zones, date, center seconds“3 time zones, date”
Dimensions31 x 43 mm“Dim. 31 x 43 mm”
Condition GradeAA Very good“Grading System Grade: AA Very good”

Visible details

  • Tonneau-shaped curved case
  • Guilloché silver dial
  • Blued steel spade hands
  • Three-zone time display with subsidiary dials

Research qualifications

  • The condition report recommends a movement overhaul
  • The exact serial number is not provided in the source text

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

Consulted source

"White Gold Master Banker" Franck Muller, Genève, "Cintrée Curvex - Master Banker", Ref. 5850 MB. Made circa 2000. Fine, tonneau-shaped and curved, center seconds, selfwinding, water-resistant, 18K white gold wristwatch with 3 time zones, date and an 18K white gold Franck Muller bracelet with double deployant clasp. Accompanied by a fitted box and certificate.

Reviewed 2026-10-26 · Record 41c97fe5d8

Terms in this record

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