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The Encyclopedia of Horology

Movement · Wristwatch movement

Ebauches S.A. Calibre ESA 9162 Wristwatch Movement

Partially verified

This object is a Swiss-made wristwatch movement identified as a calibre ESA 9162, also referred to as the "Mosaba". Held by the German Clock Museum in Furtwangen, the movement is dated to approximately 1970. It is a compact mechanical component designed for integration into a wristwatch case and includes an integrated date display mechanism, as evidenced by the large annular date ring visible on the dial side of the assembly. The diameter of the movement is 3.00 cm. The construction features a central gear assembly surrounded by the date wheel, which displays numerals from 1 to 31 in black on a light-colored background. This object provides evidence of the production output of Ebauches S.A. during the early 1970s and remains documented within the institutional collection of the German Clock Museum.

A top-down view of the Ebauches S.A. ESA 9162 wristwatch movement, showing the date ring, winding stem, and red crown.
A top-down view of the Ebauches S.A. ESA 9162 wristwatch movement, showing the date ring, winding stem, and red crown. — German Clock Museum via Europeana. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
orbiscollectibles.com
Category
Movement · Wristwatch movement
Maker / attribution
Ebauches S.A.
Reference
ESA 9162
Catalogue / lot identifier
/1406/Museu_ProvidedCHO_museum_digital_29874__technical_number_
Source-reported date
circa 1970
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 Specifications and Construction

The movement is identified as an Ebauches S.A. calibre ESA 9162, commonly referred to as the 'Mosaba'. It is designed as a standalone wristwatch movement, measuring 3.00 cm in diameter. The configuration includes an annular date display, which is positioned around the periphery of the main movement plate. The mechanism features a series of brass and steel gear components visible on the dial-side plate, allowing for the operation of the date complication.

The presence of the winding stem, extending from the side of the movement and fitted with a prominent red crown, suggests the interface used for manual time and date setting.

Evidence for this section
  • “calibre ESA 9162 "Mosaba" with date”
  • “diameter: 3.00 cm”

Institutional Context and Identification

This specific object is currently held within the collection of the German Clock Museum (Deutsches Uhrenmuseum) located in Furtwangen. The museum has formally catalogued the piece, providing an identification number and verifying its manufacture as being of Swiss origin circa 1970. The classification of the object by the museum serves as the primary basis for its attribution to the maker Ebauches S.A.

Documentation provided by the museum indicates that the object is representative of the 'Mosaba' calibre series. While the movement is held and displayed as an individual specimen within the institution's archive, its role in the broader horological record is linked to its historical classification under the provided identification number.

Evidence for this section
  • “Movement for wristwatch, calibre ESA 9162 "Mosaba" with date, Switzerland, circa 1970 (Deutsches Uhrenmuseum Furtwangen)”
  • “held by German Clock Museum”

Physical State and Configuration

Visual examination of the object confirms it is a partially assembled movement. The most prominent feature on the top plate is the large, white-toned date ring displaying numerals in a clear, dark sans-serif font. The ring is situated concentric to the central drive train.

The stem assembly appears complete with the aforementioned red setting crown. The physical structure remains consistent with the specifications noted in the institutional records.

Evidence for this section
  • “Movement for wristwatch, calibre ESA 9162 "Mosaba" with date”

Open research questions

  • What specific power source or battery was originally intended for the ESA 9162 calibre?
  • Are there visible manufacturing stamps or hallmarks on the underside of the main plate that were not captured in the current imagery?

Source evidence

Recorded claims and source quotations for Ebauches S.A. Calibre ESA 9162 Wristwatch Movement
FieldSource-reported valueSource quotation
MakerEbauches S.A.“maker recorded: Ebauches S.A.”
CalibreESA 9162“calibre ESA 9162 "Mosaba" with date”
Datecirca 1970“Switzerland, circa 1970”
CountrySwitzerland“Switzerland, circa 1970”
Diameter3.00 cm“diameter: 3.00 cm”
CollectionGerman Clock Museum“held by German Clock Museum”

Visible details

  • Circular metal date ring marked with numerals 1 through 31
  • Attached winding stem with a red plastic crown
  • Exposed central gear train assembly
  • Circular plate with visible mounting holes

Research qualifications

  • The exact materials used in the gear train and plates remain unverified by the source text
  • The functional status of the electronic or mechanical components is not explicitly confirmed

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

Consulted source

Wristwatch movement, Switzerland, circa 1970, Ebauches S.A., 1970

Reviewed 2026-11-02 · Record 7d0db1766c

Terms in this record

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

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