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The Encyclopedia of Horology

Pocket watch · Astronomical pocket watch

Jean Rousseau astronomical pocket watch

Partially verified

This pocket watch, attributed to Jean Rousseau (1606-1684) and dated circa 1660-1670, is a Genevan-made timepiece constructed from engraved silver and gilt brass. The case reverse is decorated with engraved oval vignettes depicting the Four Seasons within scrolling foliage, while the band features motifs representing the Four Elements: Earth, Air, Fire, and Water. The gilt brass dial incorporates four distinct subsidiary dials with silver rings and apertures, displaying calendar information including month, days in the month, zodiac signs, date, moon phase, lunar age, and the time in hours, along with a weekday aperture. The top plate of the internal movement is signed 'Jean Rousseau'. The object was acquired by the South Kensington Museum (now the Victoria and Albert Museum) in 1855 following the auction of the collection formerly belonging to Ralph Bernal, a politician and collector who amassed significant antiquities using wealth derived from enslaved labour in Jamaica.

Front view of the Jean Rousseau watch showing the four subsidiary astronomical and calendar dials.
Front view of the Jean Rousseau watch showing the four subsidiary astronomical and calendar dials. — Victoria and Albert Museum, London. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
collections.vam.ac.uk
Category
Pocket watch · Astronomical pocket watch
Maker / attribution
Jean Rousseau
Reference
Not recorded
Catalogue / lot identifier
2374-1855
Source-reported date
1660-1670
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

Case and Exterior Decoration

The watch is housed in an engraved silver case. The reverse side features oval vignettes illustrating the Four Seasons, framed by detailed scrolling foliage.

The outer band of the case is decorated with additional vignettes, which represent the Four Elements: Earth, Air, Fire, and Water, indicating the thematic focus of the exterior design.

Evidence for this section
  • “Watch in silver case engraved on the reverse with oval vignettes of the Four Seasons within scrolling foliage.”
  • “Around the band are vignettes representing the Four Elements: Earth, Air, Fire and Water.”

Dial and Astronomical Indicators

The dial is made of gilt brass and features four subsidiary dials. These dials utilize silver rings and apertures to display temporal and astronomical information.

The top dial indicates the month, number of days, and zodiac symbol, while the left dial tracks the date. The right dial displays moon phase and lunar age, and the bottom dial shows the hours and a weekday aperture.

Evidence for this section
  • “Gilt brass dial with subsidiary dials with silver rings and silver apertures.”
  • “The top aperture shows the name of the month, the number of days in the month, and the zodian symbol. The left dial shows the date. The right dial shows the age and the phase of the moon.”

Provenance and History

The watch originated in the collection of Ralph Bernal (1783-1854), a British politician who was a prominent collector of art and antiquities. Upon his death, his collection was auctioned.

The Museum of Ornamental Art (later the V&A) purchased 730 lots from this auction. Bernal’s ability to build his collection was linked to the income derived from enslaved labour on his plantations in Jamaica.

Evidence for this section
  • “Purchased at the auction by Christie's of the collection of Ralph Bernal (1783-1854), politician and art collector, in 1855.”
  • “730 lots were acquired for Marlborough House (Anthony Burton, Vision & Accident, V&A Publications, 1999, p. 34).”
  • “Yet the main source of income which enabled him to do this was the profits from enslaved labour.”

Open research questions

  • What is the specific mechanical arrangement of the calendar and astronomical complications within the movement?
  • Does the signature 'Jean Rousseau' imply his personal involvement in the execution of the astronomical dial or solely the movement's basic assembly?

Source evidence

Recorded claims and source quotations for Jean Rousseau astronomical pocket watch
FieldSource-reported valueSource quotation
MakerJean Rousseau“Maker: Rousseau, Jean (movement)”
Accession Number2374-1855“Accession number: 2374-1855”
Date1660-1670“Date: 1660-1670”
Place of OriginGeneva“Place of origin: Geneva (made)”
MaterialsEngraved silver with gilt brass“Materials and techniques: Engraved silver with gilt brass”
DimensionsHeight: 5.7 cm; Width: 4.7 cm; Depth: 2.5 cm“Dimensions: Height: 5.7 cm; Width: 4.7 cm; Depth: 2.5 cm”
SignedJean Rousseau“The top plate of the movement is engraved 'Jean Rousseau'.”
ProvenanceRalph Bernal Collection“Purchased at the auction by Christie's of the collection of Ralph Bernal (1783-1854), politician and art collector, in 1855.”

Visible details

  • Engraved vignettes on the case reverse depicting the Four Seasons
  • Four subsidiary dials arranged on a gilt brass dial plate
  • Movement top plate engraved with the signature 'Jean Rousseau'
  • Scrolling foliage engraving on the silver case

Research qualifications

  • The specific function of individual mechanical components within the movement remains unverified by provided technical documentation
  • Exact dating is attributed to the period 1660-1670 without specific archival precision

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

Consulted source

Watch

Reviewed 2026-10-26 · Record 25ead3736f

Terms in this record

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

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