Going-barrel watch movement, with duplex escapement
Record status
Individual type · partial
Period
1801-1830
This going-barrel watch movement featuring a duplex escapement is catalogued in the Science Museum Group collection under object number 1920-509. The source dates the piece between 1801 and 1830, reporting it as French or Swiss from the early 19th century, acquired via the Bruno Roberts Collection.
The brass movement incorporates multiple bridges secured with blued screws, an exposed wheel train, a steel escape wheel, and an index regulator scale engraved with FAST and SLOW indications.
Evidence at a glance
- Linked sources
- 1
- Photograph views
- 1
- Catalogue references
- 0
Counts describe this entry’s documentation, not authenticity, rarity or completeness. Photographs may show one specimen; check each caption and licence.
Technical characteristics
- Date
- 1801-1830
- Type
- Duplex watch movement
- Origin
- French or Swiss
- Place recorded
- France or Switzerland
- Provenance Credit
- Bruno Roberts Collection
- Escape Wheel Material
- steel
Design
- Visible features
- • Circular brass movement layout with multiple individual finger bridges secured by blued steel screws. • Balance cock fitted with an index regulator scale showing FAST and SLOW indications. • Mainspring barrel bridge engraved with numerical marking '400'.
- Identity and Provenance
- Catalogued under object number 1920-509 by the Science Museum Group, the item is titled 'Going-barrel watch movement, with duplex escapement'. It is credited in the institutional record to the 'Bruno Roberts Collection' and is categorized under 'Time Measurement' as type 'movement - clockwork and duplex watch'. The collection record lists the date of manufacture as '1801-1830' and describes the piece as 'Duplex, French or Swiss, early 19th century'. A specific maker is not recorded in the source entry.
- Documentation and Cataloguing Limits
- The item is catalogued purely as a movement; no case, dial, or hands are described or depicted in the source documentation. The origin remains broadly given as 'French or Swiss', with no narrower geographical workshop or maker identified. Physical dimensions and mechanical condition are not recorded in the museum's online record, which documents only the movement classification and the steel escape wheel material.
- Movement Architecture and Observable Features
- Direct observation of the movement displays a circular brass layout built with multiple individual finger bridges secured by blued steel screws. The balance cock is fitted with an index regulator scale that shows FAST and SLOW indications. Visual inspection also reveals the numerical marking '400' engraved upon the mainspring barrel bridge. In addition, the museum's materials record specifies 'Materials: escape wheel: steel'.
Identification
- Object Number
- 1920-509
- Source note
- Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.
Catalogue references
No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.
Research required
- Research required: The maker is not recorded in the catalogue listing.
- Research required: Dial side, casing, and dial are not present or documented.
- Research required: Country of manufacture is not definitively fixed between France and Switzerland.