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The Encyclopedia of Horology

Wristwatch · Self-winding wristwatch

Chronoswiss Opus Chronometer Ref. CH 2823

Partially verified

This Chronoswiss "Opus" wristwatch, identified by serial number 11028 and reference CH 2823, dates to the 1990s. It features a three-body stainless steel case measuring 38 mm in diameter and 10 mm in thickness. The exterior construction includes a polished and brushed finish, a reeded bezel, reeded back edge, straight lugs, screwed bars, and a screw-down transparent case back with sapphire crystals. The engine-turned silver dial displays Arabic numerals on an inner brushed chapter ring, with outer minute and seconds divisions on a brushed reserve. A date aperture is positioned at 6 o'clock. The watch is powered by a rhodium-plated Caliber 0020, based on the ETA 2892-2, which features a gold rotor, 23 jewels, and a straightline lever escapement. The auction description reports the movement is adjusted in five positions and includes a micrometer regulator, shock absorber, and self-compensating flat balance-spring.

Front view of the Chronoswiss Opus Chronometer wristwatch featuring an engine-turned dial.
Front view of the Chronoswiss Opus Chronometer wristwatch featuring an engine-turned dial. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Wristwatch · Self-winding wristwatch
Maker / attribution
Chronoswiss
Reference
CH 2823
Catalogue / lot identifier
192
Source-reported date
1990s
Source-reported place
Switzerland
Source-reported serial
11028

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 Construction

The case of this Chronoswiss Opus is manufactured from stainless steel and consists of a three-body construction. It is finished with a combination of polished and brushed surfaces. Notable design elements include a distinctive reeded bezel and a matching reeded back edge.

The timepiece features straight lugs fitted with screwed bars for the strap. The case back is of the screw-down, transparent type, utilizing sapphire crystals to reveal the interior movement. The overall diameter of the case is 38 mm, with a thickness of 10 mm.

Evidence for this section
  • “C. Three-body, solid, polished and brushed, reeded bezel and back edge, straight lugs, screwed bars, screw-down transparent case back, sapphire crystals.”
  • “Diam. 38 mm. Thickness: 10 mm.”

Dial and Hands

The dial is executed in engine-turned silver, incorporating an inner brushed chapter ring. This ring carries Arabic numerals for the hours. Further detailing includes outer minute and seconds divisions set upon a brushed reserve area.

A date aperture is positioned at 6 o'clock. The time is indicated by a set of blued steel Breguet-style hands, which provide visual contrast against the silver dial background.

Evidence for this section
  • “D. Engine-turned silver, inner brushed chapter ring with Arabic numerals, outer minute and seconds divisions on a brushed reserve, date aperture at 6. Blued steel Breguet hands.”

Movement Details

The watch is driven by a rhodium-plated Caliber 0020 movement, which the source notes is based on the ETA 2892-2. The movement is decorated with oeil-de-perdrix patterns and features a gold rotor.

Technical specifications provided include a straightline lever escapement, 23 jewels, a shock absorber, a micrometer regulator, and a self-compensating flat balance-spring. The monometallic balance is adjusted in five positions.

Evidence for this section
  • “M. Cal. 0020, based ETA 2892-2, rhodium-plated, oeil-de-perdrix decoration, 23 jewels, straightline lever escapement, monometallic balance adjusted in 5 positions, shock absorber, self-compensating flat balance-spring, micrometer regulator, gold rotor.”

Open research questions

  • What specific modifications did Chronoswiss apply to the ETA 2892-2 base caliber to designate it as the Caliber 0020?
  • Were there multiple sub-references or minor variations in dial finish for the Ref. CH 2823 throughout the 1990s?

Source evidence

Recorded claims and source quotations for Chronoswiss Opus Chronometer Ref. CH 2823
FieldSource-reported valueSource quotation
MakerChronoswiss“Chronoswiss”
ReferenceCH 2823“Ref. CH 2823”
Case Diameter38 mm“Diam. 38 mm.”
Movement CaliberCal. 0020 (based ETA 2892-2)“M. Cal. 0020, based ETA 2892-2”
Date FunctionDate aperture at 6“date aperture at 6”
Case MaterialsStainless steel“stainless steel wristwatch”
Jewel Count23“23 jewels”

Visible details

  • Reeded bezel and case back edge design
  • Engine-turned silver dial texture
  • Blued steel Breguet-style hands
  • Date aperture located at 6 o'clock

Research qualifications

  • Verification of the specific ETA base movement modification extent
  • Assessment of mechanical performance over time

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

Consulted source

Opus Chronoswiss, "Opus", Chronometer No. 11028, Ref. CH 2823. Made in the 1990s. Fine, self-winding, water-resistant, stainless steel wristwatch with center-seconds, date and stainless steel buckle. Accompanied by a fitted box and guarantee.

Reviewed 2026-10-26 · Record 7242117fc4

Terms in this record

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

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