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The Encyclopedia of Horology

Tool · Horological demonstration model

Oris Pin-Lever Escapement Demonstration Model

Partially verified

Constructed from chromium-plated metal, the piece features an enlarged movement architecture complete with a monometallic balance wheel and a flat hairspring. A manual stop-balance mechanism is positioned at the 12 o'clock location to arrest the motion of the balance. The unit is powered by an electric drive system and includes an electrical socket equipped with two male plugs for operation. The model is presented on a wooden base and is accompanied by a protective glass dome. The overall assembly measures approximately 165 x 160 x 120 mm, with the additional base and dome providing a larger footprint. The dial side features prominent Oris branding in shield-style motifs on either side of the escapement bridge.

Oris pin-lever escapement demonstration model under a glass dome.
Oris pin-lever escapement demonstration model under a glass dome. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Tool · Horological demonstration model
Maker / attribution
Oris Watch Co.
Reference
Not recorded
Catalogue / lot identifier
345
Source-reported date
circa 1940-1950
Source-reported place
Switzerland
Source-reported serial
179

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

Model Construction

This demonstration model is constructed from chromium-plated metal and is configured to display the specific mechanics of a pin-lever escapement. The escapement assembly is mounted to a plate that includes, as a primary feature, a monometallic balance wheel paired with a flat hairspring. To facilitate the instructional use of the model, a stop-balance device is integrated at the 12 o'clock position, allowing the user to immobilize the balance during observation of the escapement's geometry.

The model is designed for continuous operation through an electric drive system. The connection for this power source is facilitated by an electrical socket located on the unit, which features two male plugs. The entire assembly sits on a wooden base and is protected by a glass dome, intended for permanent display or demonstration purposes within a retail or educational setting.

Evidence for this section
  • “demonstration model of a pin-lever escapement, with monometallic balance and flat hairspring; stop-balance at 12 o’clock”
  • “electric motion with an electrical socket with two male plugs”

Signatures and Branding

The object features the Oris brand name as a central identifying mark. On the primary circular movement plate, the Oris name is displayed twice, once on each side of the central escapement bridge, presented within stylized shield logos. These shields are finished in a color-contrasting manner, emphasizing the branding for potential observers.

An additional Oris label is mounted on the wooden base of the unit. This metal plaque features the brand name in clear, sans-serif lettering, providing a formal identification for the model while it is resting within its display dome.

Evidence for this section
  • “Brand Oris, Hölstein, Waldenburg District, Basel-Landschaft”

Condition and Accessories

The auction description reports the condition of the case as 'Good' and the movement as 'Good'.

The model is sold as a set, which includes an additional wooden base and a protective glass dome. The dome measures approximately 225 mm in diameter and stands about 250 mm in height.

Evidence for this section
  • “Case: 3 Good Movement: 3* Good Overhaul recommended, at buyer's expense”
  • “additional later wood base with protective glass dome”

Open research questions

  • What is the specific intended purpose of the electrical socket in this demonstration model?
  • Can the conflicting dates of 'modern model' and 'circa 1940-1950' be reconciled through further records?
  • What was the original context for the distribution of these models by the Oris factory?

Source evidence

Recorded claims and source quotations for Oris Pin-Lever Escapement Demonstration Model
FieldSource-reported valueSource quotation
MakerOris Watch Co.“Oris Watch Co.”
MaterialsChromium-plated metal“chromium-plated metal”
Datecirca 1940-1950“circa 1940-1950”
Movement detailsPin-lever escapement, monometallic balance, flat hairspring“demonstration model of a pin-lever escapement, with monometallic balance and flat hairspring”
Dimensions165 x 160 x 120 mm“165 x 160 x 120 mm.”
Case Number179“Case No. 179”
Additional componentsElectrical socket with two male plugs“electric motion with an electrical socket with two male plugs”

Visible details

  • Visible Oris branding on both sides of the movement plate
  • Presence of a jewel-set balance and lever bridge
  • Stop-balance lever positioned at the 12 o'clock marker
  • Included glass dome and wooden stand

Research qualifications

  • The source identifies the item as a 'modern model' in one instance, contradicting the circa 1940-1950 date
  • The functionality of the electric motion system is not confirmed

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

Consulted source

Oris Watch Co. Demonstration model of a pin-lever escapement, electric motion; chromium-plated metal

Reviewed 2026-10-26 · Record 3f63d3ee3a

Terms in this record

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