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The Encyclopedia of Horology

Wristwatch · Ladies' wristwatch

Franck Muller Cintrée Curvex Heart Ref. 1750 S6 HJ

Partially verified

This Franck Muller Cintrée Curvex Heart lady's wristwatch, reference 1750 S6 HJ, is numbered 86 and attributed to the 2000s. The watch features a tonneau-shaped 18K white gold case with dimensions of 22 x 38 mm and a thickness of 8 mm. Its decorative composition includes a bezel and heart-shaped lugs pavé-set with 168 round diamonds. The dial is finished with a blue guilloché pattern and is decorated with stylized, painted radial Arabic numerals, paired with blued steel double spade hands. The movement is a rhodium-plated mechanical caliber with 17 jewels, utilizing a straight-line lever escapement, a monometallic balance adjusted to five positions, and a self-compensating flat balance spring. The winding crown is fitted with a cabochon sapphire. This timepiece is accompanied by an 18K white gold Franck Muller buckle set with four diamonds, a fitted box, and a certificate.

Front view of the Franck Muller Cintrée Curvex Heart wristwatch, showing the blue guilloché dial and diamond-set heart-shaped lugs.
Front view of the Franck Muller Cintrée Curvex Heart wristwatch, showing the blue guilloché dial and diamond-set heart-shaped lugs. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Wristwatch · Ladies' wristwatch
Maker / attribution
Franck Muller
Reference
1750 S6 HJ
Catalogue / lot identifier
95
Source-reported date
2000s
Source-reported place
Switzerland
Source-reported serial
86

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 watch utilizes a tonneau-shaped case measuring 22 mm by 38 mm, constructed from 18K white gold. The exterior finish combines polished and brushed surfaces. The bezel and the distinctive heart-shaped lugs are set with 168 round diamonds. A sapphire crystal covers the front, and the case back is secured by four screws. The winding crown is embellished with a cabochon sapphire.

The dial is colored in blue with a guilloché pattern. It features stylized, painted radial Arabic numerals and uses blued steel double spade hands for time indication. The auction description notes that the dial, case, and movement are signed.

Evidence for this section
  • “tonneau-shaped, 18K white gold and diamond lady's wristwatch”
  • “bezel and heartshaped lugs set with 168 round diamonds”
  • “Guilloche blue with stylized painted radial Arabic numerals. Blued steel double spade hands.”
  • “Dial, case and movement signed.”

Movement and Performance

The movement is a rhodium-plated mechanical caliber containing 17 jewels. The design incorporates a straight-line lever escapement and a monometallic balance that has been adjusted for isochronism, temperature, and five positions. It also includes a shock absorber and a self-compensating flat balance spring.

The general grading for the movement is listed as 2* (very good), with the dial assessed as 1-01 (as new).

Evidence for this section
  • “Rhodium-plated, 17 jewels, straight-line lever escapement, monometallic balance adjusted to heat, cold, isochronism and 5 positions”
  • “shock absorber, self-compensating flat balance spring.”
  • “Overhaul recommended, at buyer's expense”

Accompaniments and Attribution

This timepiece is identified as number 86, with a reference of 1750 S6 HJ. The watch is accompanied by a fitted box and a certificate. Included with the watch is an 18K white gold Franck Muller buckle set with four diamonds.

The auction house dates the production of this watch to the 2000s. All stated features, including the diamond settings and the mechanical components, are documented as part of the lot provided for sale.

Evidence for this section
  • “No. 86, Ref. 1750 S6 HJ. Made in the 2000's.”
  • “Accompanied by a fitted box and certificate.”
  • “18K white gold Franck Muller buckle set with four diamonds.”

Open research questions

  • What is the specific movement caliber number used in the 1750 S6 HJ reference?
  • Are there variations of this model that feature different dial colors or stone settings within the Cintrée Curvex Heart line?

Source evidence

Recorded claims and source quotations for Franck Muller Cintrée Curvex Heart Ref. 1750 S6 HJ
FieldSource-reported valueSource quotation
MakerFranck Muller“Frank Muller”
Reference1750 S6 HJ“Ref. 1750 S6 HJ”
Case Material18K white gold“18K white gold”
Case Dimensions22 x 38 mm“DIM. 22 x 38 mm.”
Movement TypeMechanical“MECHANICAL”
Diamond Setting168 round diamonds on bezel and lugs“bezel and heartshaped lugs set with 168 round diamonds”
EscapementStraight-line lever“straight-line lever escapement”
Jewel Count17“17 jewels”

Visible details

  • Blue guilloché dial surface
  • Heart-shaped lug geometry
  • Pavé-set diamond bezel
  • Cabochon sapphire-set winding crown

Research qualifications

  • Movement condition currently assessed as requiring an overhaul
  • Manufacturing date is approximated as the 2000s

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

Consulted source

FRANCK MULLER, CINTREE CURVEX HEART, MECHANICAL, WHITE GOLD AND DIAMONDS Frank Muller, "Cintrée Curvex Heart," No. 86, Ref. 1750 S6 HJ. Made in the 2000's. Fine, tonneau-shaped, 18K white gold and diamond lady's wristwatch with an 18K white gold Franck Muller buckle set with four diamonds. Accompanied by a fitted box and certificate.

Reviewed 2026-10-26 · Record f81e0f8178

Terms in this record

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

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