Skip to content
The Encyclopedia of Horology

Pocket watch · Chronograph pocket watch

Swiss Silver 0.800 Chronograph / Tachymeter Pocket Watch

Partially verified

This open face chronograph pocket watch features a white enamel dial with Roman numeral hour markers, two sub-dials, and blue and red tachymeter calibration tracks around the outer periphery. It is housed in a 0.800 silver case measuring 52 mm in diameter. The dial incorporates a central chronograph sweep seconds hand, a subsidiary seconds dial at 6 o'clock, and a 30-minute counter at 12 o'clock. According to the seller, the watch is unsigned, Swiss made, and dates to the 1920s.

Dial and front view of the open face silver pocket watch
Dial and front view of the open face silver pocket watch — Euro Antique Watches. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.antiques-atlas.com
Category
Pocket watch · Chronograph pocket watch
Maker / attribution
Not established
Reference
Not recorded
Catalogue / lot identifier
as834a567
Source-reported date
1920s
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

Object Identity and Dating

This is an open-face chronograph pocket watch featuring a 52 mm 0.800 silver case. The watch is reported to be unsigned and of Swiss manufacture. There is conflicting dating provided within the source, which references both 'C.1900' and '1920s'.

The case features an engine-turned finish on the back with a free monogram cartouche. The construction includes a hinged inner dust cover, back, and bezel.

Evidence for this section
  • “Rare Silver 0.800 Chronograph/Tachymeter Pocket Watch C.1900”
  • “Unsigned- Swiss Made – 1920s”
  • “The back of the case has a engine turn finish with free monogram.”
  • “the movement comes in a silver 0.800 open face case, which has a hinged inner, back and bezel.”

Dial Configuration

The watch displays a white enamel dial marked with Roman numeral hour indices. It is equipped with gilt hour and minute hands, and a blue steel sweep chronograph hand. The dial layout includes a subsidiary seconds dial.

The outer periphery of the dial contains tachymeter calibration tracks printed in blue and red.

Evidence for this section
  • “the white enamel has a pair of gilt hands, a blue steel sweep chronograph hand and one blue steel subsidiary hands.”
  • “The chronograph numbers show two colours blue and red.”

Mechanism Description

According to the dealer description, the movement is a gilt 3/4 plate caliber featuring a lever escapement. The mechanism includes exposed steel components to facilitate start, stop, fly back, and reset chronograph functions, with a 30-minute register.

A fluted winding crown is positioned at 12 o'clock.

Evidence for this section
  • “the gilt ¾ plate movement has a lever escapement with exposed steel work for a start, stop, fly back and reset chronograph function with a 30-minute register.”

Open research questions

  • Are there any maker's marks or hallmarks hidden on the movement or inner dust cover, given that the watch is described as unsigned?
  • Can the conflicting dating ('C.1900' vs '1920s') be reconciled by inspecting the movement serial or design style?
  • Does the 'free monogram' indicate the absence of an engraving or a previously removed engraving?

Source evidence

Recorded claims and source quotations for Swiss Silver 0.800 Chronograph / Tachymeter Pocket Watch
FieldSource-reported valueSource quotation
Case material0.800 silver“housed in a 0.800 silver case.”
Diameter52mm“Diameter: 52mm”
OriginSwiss Made“Unsigned- Swiss Made – 1920s”
Chronograph register30-minute register“start, stop, fly back and reset chronograph function with a 30-minute register.”
Total weight87.20“Weight: 87.20”

Visible details

  • White enamel dial with black Roman numerals and concentric blue and red outer tracks.
  • Fluted brass-toned winding crown within a silver oval bow at 12 o'clock.
  • Central blued steel sweep hand along with dark Breguet-style hour and minute hands.
  • Upper sub-dial located below 12 o'clock and running subsidiary sub-dial above 6 o'clock.

Research qualifications

  • The movement and interior case back are not visible in the provided image.
  • The source text gives conflicting approximate dates of 'C.1900' and '1920s'.

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

Consulted source

Antiques Atlas - Rare Silver 0.800 Chronograph / Tachymeter P/W 1920 as834a567 / Rare Silver 0.800 Chronog

Reviewed 2026-10-22 · Record e9afc40a96

Terms in this record

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

Other chronograph pocket watch records