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The Encyclopedia of Horology

Wristwatch · Monopusher chronograph wristwatch

Daniel Roth Yellow Gold Monopusher Chronograph

Partially verified

This Daniel Roth wristwatch features the maker's signature ellipsocurvex case in 18K yellow gold, measuring 38 mm wide by 41 mm long. Dated by the source to circa 1990, the watch is catalogued as part of a limited edition of 36 yellow gold examples powered by the manual-wind Calibre 2220, based on a vintage Lemania ébauche. The dial combines a guilloché centre, Roman numerals on a brushed hour ring, two subsidiary dials, and blued steel hands with pointed tips. The bottom dial plaque bears the inscription 'NUMERO 20', matching the source-recorded case and movement number.

Front view of the Daniel Roth 18K yellow gold monopusher chronograph dial and case
Front view of the Daniel Roth 18K yellow gold monopusher chronograph dial and case — Phillips. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.phillips.com
Category
Wristwatch · Monopusher chronograph wristwatch
Maker / attribution
Daniel Roth
Reference
Not recorded
Catalogue / lot identifier
229
Source-reported date
Circa 1990
Country
Switzerland
Source-reported serial
20

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 External Construction

The timepiece features an 18K yellow gold ellipsocurvex case, described as double-stepped with straight lugs, measuring 38 mm in width and 41 mm in length. It is equipped with a single chronograph pusher at the 2 o'clock position.

The dial includes a guilloché pattern, a brushed chapter ring with Roman numerals, and two sub-dials. A plaque located at the 6 o'clock position is inscribed with 'NUMERO 20', with 'SWISS' printed beneath the VI marker.

Evidence for this section
  • “Material 18K yellow gold”
  • “Ellipsocurvex yellow gold double-stepped case with straight lugs”
  • “Dimensions 38mm width X 41mm length”
  • “Single chronograph pusher positioned at 2 o'clock above the winding crown”
  • “Plaque at 6 o'clock inscribed 'NUMERO 20' and 'SWISS' printed below the VI marker”

Mechanism and Provenance

The watch is powered by a manual-wind Calibre 2220, noted as a vintage Lemania 15CHT or 2220 ébauche. The movement and case back are not visible in the provided image.

According to the source, the watch was serviced by Daniel Roth in 2017, and the lot includes a repair certificate and an accompanying letter from the maker.

Evidence for this section
  • “Calibre Manual, Cal 2220”
  • “uses a vintage Lemania 15CHT or 2220 ebauche from the 1930s”
  • “serviced by Daniel Roth himself in 2017”
  • “Accompanied by Daniel Roth repair cerificate”

Limited Edition Context

This example is one of 36 yellow gold pieces produced as part of a limited edition. The total production for the model is cited as 52 pieces, including 16 platinum examples.

The source notes that 10 additional movements were later discovered and cased, distinguishable from the original production models by the presence of a swan-neck regulator.

Evidence for this section
  • “part of a limited edition of 36 pieces”
  • “Only 52 were made, 16 in platinum and 36 in yellow gold”
  • “10 extra movements were later discovered and cased but can be differentiated with the original models as they featured a swan neck regulator”

Open research questions

  • What specific physical features, other than the swan-neck regulator, might differentiate the 'original' 36 yellow gold pieces from the 10 subsequently cased examples?
  • Does the 2017 service documentation mention any specific component replacements that could impact the historical integrity of the movement?
  • Can the reference number be verified through secondary archives given its absence in the auction catalogue?

Source evidence

Recorded claims and source quotations for Daniel Roth Yellow Gold Monopusher Chronograph
FieldSource-reported valueSource quotation
Case Material18K yellow gold“Material 18K yellow gold”
CalibreManual, Cal 2220“Calibre Manual, Cal 2220”
Case Number20“Case No 20”
Dimensions38mm width X 41mm length“Dimensions 38mm width X 41mm length”
Edition Size36 pieces“part of a limited edition of 36 pieces”
Movement Number20“Movement No N°20”

Visible details

  • Ellipsocurvex yellow gold double-stepped case with straight lugs
  • Silvered dial featuring textured guilloché centre, brushed chapter ring with black Roman numerals, and two sub-dials
  • Single chronograph pusher positioned at 2 o'clock above the winding crown
  • Blued steel hands with pointed tips and central chronograph seconds hand
  • Plaque at 6 o'clock inscribed 'NUMERO 20' and 'SWISS' printed below the VI marker

Research qualifications

  • Movement and case back are not visible in the supplied photograph
  • Reference number is not specified in the auction catalogue listing

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

Consulted source

Daniel Roth The Geneva Watch Auction: XVI

Reviewed 2026-10-22 · Record 5b781ecffb

Terms in this record

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

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