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Franck Muller Cintrée Curvex Master Banker Ref. 5850 MB

ProbableCredible evidence exists but classification is not fully established.

Record status

Individual type · partial

Period

circa 2000

Maker / issuer

Franck Muller

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.

Evidence at a glance

Linked sources
1
Photograph views
1
Catalogue references
0

Counts describe this entry’s documentation, not authenticity, rarity or completeness. Photographs may show one specimen; check each caption and licence.

Technical characteristics

Type
Master Banker wristwatch
Maker
Franck Muller
Movement
Caliber 2800
Reference
5850 MB
Dimensions
31 x 43 mm
Case Material
18K white gold
Complications
3 time zones, date, center seconds
Place recorded
Switzerland
Condition Grade
AA Very good
Maker / attribution
Franck Muller

Design

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

Identification

Reference
5850 MB
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.

Research required

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