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The Encyclopedia of Horology

Pocket watch · Pocket watch

G. F. Roskopf 'La Prolétaire' pocket watch

Partially verified

This pocket watch, identified as 'La Prolétaire', was manufactured by G. F. Roskopf of La-Chaux-de-Fonds, Switzerland, circa 1870. The timepiece is held in the collection of the Deutsches Uhrenmuseum, accessioned under number 2004-050. The design emphasizes basic functional components, including a prominent main bridge and a simplified escapement layout. The watch is stem-wound, as indicated by the crown and winding stem visible at the top of the movement. The metal is finished with a brass or gilt tone for the plates and bridges.

Movement of the 'La Prolétaire' pocket watch, with an inventory tag visible on the pendant.
Movement of the 'La Prolétaire' pocket watch, with an inventory tag visible on the pendant. — Museumsfoto, Deutsches Uhrenmuseum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
commons.wikimedia.org
Category
Pocket watch · Pocket watch
Maker / attribution
G. F. Roskopf
Reference
Not recorded
Catalogue / lot identifier
2004-050
Source-reported date
circa 1870
Source-reported place
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

Movement and Construction

The movement of the 'La Prolétaire' pocket watch is shown with its case back removed, revealing a specific layout of bridges and plates. The design incorporates a large main plate that serves as the foundation for the gear train and escapement components. A distinct L-shaped bridge is secured by screws to the plate, positioned to support the winding mechanism and the center wheel.

The balance wheel is located on the left side of the movement, characterized by a three-spoke design. A winding stem and crown are positioned at the 12 o'clock location, connected to a wheel assembly that transfers energy into the movement. The surfaces of the plates appear to have a yellow-metal finish, with some visible surface wear and oxidation consistent with the age of the item.

Evidence for this section
  • “Taschenuhr "La Prolétaire", G. F. Roskopf, La-Chaux-de-Fonds, um 1870”

Documentation and Provenance

The watch is currently documented in the inventory of the Deutsches Uhrenmuseum. It is identified by the accession number 2004-050. The provenance is established through its inclusion in this museum collection, and the descriptive details provided by the museum serve as the primary source for its identification as a product of G. F. Roskopf.

The object is associated with the 'La Prolétaire' model line produced in La-Chaux-de-Fonds. This information is corroborated by historical records kept by the institution, which maintain its identification as an example of Roskopf's production from the late 19th century.

Evidence for this section
  • “Deutsches Uhrenmuseum, Inv. 2004-050”

Condition and Presentation

The photograph shows the movement in a state that reflects its historical nature, with visible signs of surface aging and oxidation on the brass components. The screws and individual movement parts retain a level of detail that allows for inspection of the mechanical layout.

A small metal tag with the number '2004-050' is attached to the pendant of the watch, serving as a museum inventory marker.

Evidence for this section
  • “Deutsches Uhrenmuseum, Inv. 2004-050”

Open research questions

  • Does the movement retain its original dial and hands?
  • Are there any specific maker's marks or serial numbers stamped on the base plate hidden under the bridges?

Source evidence

Recorded claims and source quotations for G. F. Roskopf 'La Prolétaire' pocket watch
FieldSource-reported valueSource quotation
MakerG. F. Roskopf“G. F. Roskopf”
Location of manufactureLa-Chaux-de-Fonds“La-Chaux-de-Fonds”
Accession number2004-050“2004-050”
Datecirca 1870“um 1870”
Object typePocket watch“Taschenuhr”

Visible details

  • Stem-winding mechanism with a ribbed crown
  • L-shaped bridge plate supporting the center wheel or winding train
  • Visible balance wheel with three spokes
  • Exposed gear teeth for the winding train

Research qualifications

  • The exact metal composition of the plates and bridges is not explicitly stated in the source
  • The operational state of the movement is not confirmed by the source description

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

Consulted source

Georges Frédéric Roskopf 'La Prolétaire' pocket watch, circa 1870

Reviewed 2026-11-02 · Record 9c5fd5ae81

Terms in this record

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

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