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The Encyclopedia of Horology

Wristwatch · Chronograph

Eberhard & Co. 'Pre-Extra Fort' Chronograph in 18k Rose Gold

Partially verified

This Eberhard & Co. Pre-Extra-Fort chronograph wristwatch is dated by the seller to circa the 1940s. The 40 mm hinged case is crafted from 18k rose gold and fitted with an oval start/stop/reset chronograph button at 2 o'clock alongside an oval slide at 4 o'clock for halting and restarting timing. The patinated dial is signed 'Eberhard & Co La Chaux-de-Fonds' and features baton hour markers, an outer telemeter track, a central spiral tachymeter scale, and two sunken engine-turned subsidiary dials for running seconds and a 30-minute counter.

Front view of the Eberhard & Co. 18k rose gold chronograph wristwatch dial and case
Front view of the Eberhard & Co. 18k rose gold chronograph wristwatch dial and case — Vintage Watch Specialist. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
vintagewatchspecialist.com
Category
Wristwatch · Chronograph
Maker / attribution
Eberhard & Co.
Reference
Not recorded
Catalogue / lot identifier
vws2303
Source-reported date
c. 1940s
Country
Switzerland

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

Identity and Case Construction

The catalog listing describes the piece as an Eberhard Pre-Extra-Fort chronograph wristwatch housed in an 18k solid rose gold hinged case measuring 40 mm. Visual inspection confirms the front of an 18k gold case, although internal hinges or caseback hallmarks are not recorded in this source photograph.

Operating controls on the case band comprise a fluted winding crown flanked by an upper oval button at 2 o'clock and an oval slide at 4 o'clock. According to the seller, the 2 o'clock button functions as a start/stop/reset control, while the 4 o'clock slide halts and restarts the chronograph without resetting the recorded elapsed time.

Evidence for this section
  • “The 18k solid rose gold hinged case measures a substantial 40mm”
  • “The case is fitted with an oval start/stop/reset chronograph button at 2 and an oval slide to stop/restart the chronograph without resetting the recorded time at 4.”
  • “Fluted winding crown flanked by an oval upper chronograph pusher and an oval lower slide on the 18k gold case”

Dial Configuration and Visual State

The dial is described as originally ivory, signed by Eberhard & Co and marked 'Swiss-made', bearing baton markers for the hour plots and darkened baton hands. Direct observation confirms aged spotting and discoloration across the face, described by the dealer as an attractive 'newsprint, sepia' patina.

The dial incorporates two sunken engine-turned subsidiary dials: constant seconds at 9 o'clock and a 30-minute counter at 3 o'clock. Surrounding these registers is an outer telemeter scale and an inner spiral tachymeter scale.

Evidence for this section
  • “The (originally) ivory dial is signed by Eberhard & Co and marked Swiss-made.”
  • “The hour plots have baton markers and the watch also features an outer telemeter scale and inner spiral tachymeter scale, two sunken engine-turned subsidiary dials for constant seconds and 30 minutes register.”
  • “Patinated dial with aged spotting and newsprint/sepia discoloration across the face”

Documentation and Movement Observations

The seller dates the watch to circa the 1940s ('c.1940s') and assigns it a condition rating of 8.5/10, though dealer condition scores are subjective commercial assessments rather than verified facts. The listing notes that both original box and papers are absent ('Box/Papers No/No').

No internal movement photographs, caliber designations, jewel counts, or case reference numbers are recorded in this source. The watch is shown fitted to an attached brown textured leather strap.

Evidence for this section
  • “Pre-Extra Fort - 18k Rose Gold - c.1940s”
  • “Condition 8.5/10”
  • “Box/Papers No/No”
  • “Attached brown textured leather strap”

Open research questions

  • What specific base caliber powers the chronograph mechanism, and does the movement plate bear Eberhard & Co markings?
  • What reference, serial, or hallmark numbers are engraved on the inner case back or outer case?

Source evidence

Recorded claims and source quotations for Eberhard & Co. 'Pre-Extra Fort' Chronograph in 18k Rose Gold
FieldSource-reported valueSource quotation
Case Material and Size18k solid rose gold hinged case measuring 40 mm“The 18k solid rose gold hinged case measures a substantial 40mm”
Chronograph PushersOval pusher at 2 o'clock and oval slide at 4 o'clock“The case is fitted with an oval start/stop/reset chronograph button at 2 and an oval slide to stop/restart the chronograph without resetting the recorded time at 4.”
Dial ScalesOuter telemeter scale and inner spiral tachymeter scale“the watch also features an outer telemeter scale and inner spiral tachymeter scale”
Subsidiary RegistersTwo sunken engine-turned dials for constant seconds and 30-minute counter“two sunken engine-turned subsidiary dials for constant seconds and 30 minutes register.”
Stock Numbervws2303“SKU: vws2303”
Original Dial ColorReported as originally ivory“The (originally) ivory dial is signed by Eberhard & Co and marked Swiss-made.”
Box and PapersNone included“Box/Papers No/No”
Seller Condition Score8.5/10“Condition 8.5/10”

Visible details

  • Patinated dial with aged spotting and newsprint/sepia discoloration across the face
  • Outer telemeter scale calibrated in kilometers and central multi-turn spiral tachymeter scale
  • Two sunken subsidiary dials at 9 o'clock (constant seconds) and 3 o'clock (30-minute counter)
  • Fluted winding crown flanked by an oval upper chronograph pusher and an oval lower slide on the 18k gold case
  • Darkened hands including baton style hour/minute hands and central chronograph hand
  • Attached brown textured leather strap

Research qualifications

  • Movement caliber and internal case markings are neither visible in the photograph nor specified in the text excerpt
  • Originality of dial finish is assessed by the dealer and not independently verifiable from external documentation

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

Consulted source

Eberhard & Co - La Chaux-de-Fonds Télémètre Dial - Pre-Extra Fort - 18 – Vintage Watch Specialist

Reviewed 2026-10-21 · Record abfaa5f006

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

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