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The Encyclopedia of Horology

Wristwatch · Self-winding wristwatch

Franck Muller Cintrée Curvex Black Watch Ref. 2852 CASA

Partially verified

This Franck Muller wristwatch, identified as reference 2852 CASA from the Cintrée Curvex collection, is a black PVD-coated timepiece produced circa 2005. It features a distinct tonneau-shaped, curved case measuring 31 mm by 43 mm with a thickness of 9 mm. The case back is secured by four screws, and the watch is fitted with a domed sapphire crystal. The black dial displays luminous radial Arabic numerals and luminous blued steel lozenge hands, with the signature "Blackwatch" appearing on the dial. The watch is powered by a self-winding Caliber 2800 movement, which is rhodium-plated and features engraved decoration, 21 jewels, a straight-line lever escapement, and a micrometer regulator. It is water-resistant and includes a matching PVD-coated Franck Muller buckle. This piece is noted as number 50 of 50 examples.

A front view of the Franck Muller Cintrée Curvex Black Watch Ref. 2852 CASA showing the black dial, Arabic numerals, and the black PVD-coated tonneau-shaped case.
A front view of the Franck Muller Cintrée Curvex Black Watch Ref. 2852 CASA showing the black dial, Arabic numerals, and the black PVD-coated tonneau-shaped case. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Wristwatch · Self-winding wristwatch
Maker / attribution
Franck Muller
Reference
2852 CASA
Catalogue / lot identifier
74
Source-reported date
circa 2005
Source-reported place
Switzerland
Source-reported serial
50/50

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 Design

The watch features a distinctive tonneau-shaped case, which is curved to follow the wrist. The exterior is PVD-coated and polished, contributing to the uniform dark aesthetic of the "Black Watch" model. The case back is secured with four screws, and the watch is equipped with a domed sapphire crystal.

The dial is finished in black and is styled with large, radial Arabic numerals finished with luminous material. The time is displayed via blued steel lozenge hands, also treated with luminous material for visibility. The dial displays the manufacturer's name, the location of origin, and the specific model name.

Evidence for this section
  • “Fine, tonneau-shaped, curved, PVD-coated”
  • “case back secured by 4 screws, domed sapphire crystal”
  • “Black with luminous radial Arabic numerals. Luminous blued steel lozenge hands”

Movement and Technical Features

The timepiece is powered by the Franck Muller Caliber 2800 self-winding movement. The movement contains 21 jewels and is fitted with a straight-line lever escapement.

Technical regulation is managed by a micrometer regulator. The monometallic balance is adjusted to six positions, and the watch utilizes a self-compensating flat balance spring and a shock absorber system for added durability.

Evidence for this section
  • “Cal. 2800, rhodium-plated with fi nely engraved decoration, 21 jewels”
  • “straight-line lever escapement, monometallic balance adjusted to 6 positions, shock absorber, self-compensating fl at balance spring, micrometer regulator”

Condition and Status

The auction description reports that the object is in overall good condition. Specifically, the case is listed as very good and the dial is described as being in an "as new" state. The hands are confirmed as original to the watch.

The dial, case, and movement are all confirmed to be signed by the maker.

Evidence for this section
  • “Grading System Grade: A Good”
  • “Case: 2 Very good”
  • “Movement: 2* Very good Overhaul recommended, at buyer's expense”
  • “Dial: 1-01 As new”

Open research questions

  • What specific PVD material process was used for this series circa 2005?
  • Does the movement decoration contain the maker's logo or specific engraving patterns?

Source evidence

Recorded claims and source quotations for Franck Muller Cintrée Curvex Black Watch Ref. 2852 CASA
FieldSource-reported valueSource quotation
MakerFranck Muller“Franck Muller, Genève”
ModelCintrée Curvex Black Watch“Cintrée Curvex, Black Watch”
Reference2852 CASA“Ref. 2852 CASA”
Serial Number50/50“No. 50 /50”
Dimensions31 mm x 43 mm“Dim. 31 x 43 mm”
MovementCaliber 2800“Cal. 2800, rhodium-plated with fi nely engraved decoration”
CasePVD-coated tonneau“tonneau-shaped, curved, PVD-coated”

Visible details

  • PVD-coated case and buckle finish
  • Curved tonneau case architecture
  • Luminous radial Arabic numeral hour markers
  • Blued steel lozenge-shaped hands

Research qualifications

  • The auction description recommends an overhaul for the movement
  • The exact water-resistance depth is not specified

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

Consulted source

FRANCK MULLER REF. 2852 CASA BLACK WATCH PVD-COATED Franck Muller, Genève, Cintrée Curvex, Black Watch, Ref. 2852 CASA, No. 50 /50. Made in circa 2005. Fine, tonneau-shaped, curved, PVD-coated, center seconds, self-winding, water-resistant, wristwatch with a PVD-coated Franck Muller buckle.

Reviewed 2026-10-26 · Record bdcdfee80b

Terms in this record

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

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