Synchronous motor driven clock movement, Venner Ltd., type ER
Record status
Individual type · partial
Period
1940-1953
According to the Science Museum Group, this synchronous motor-driven clock movement with a thirty-hour auxiliary spring reserve was made between 1940 and 1953 by Venner Ltd. in New Malden, Surrey, England.
Catalogued under object number 1953-265 (part 1953-265/1), the movement is constructed from brass, steel, and unidentified transparent plastic. It features a drum-like cylindrical body with transparent curved casing revealing interior gearing, mounted to an extended flat brass plate. The top plate is marked with slots and labels reading 'REGULATOR', 'HAND WIND', and 'SPECIAL TEST', while an electrical lead extends from the casing.
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
- Type
- Clock movement
- Maker
- Venner Ltd.
- Model Type
- type ER
- Place recorded
- England
- Spring Reserve
- 30 hours auxiliary spring reserve
- Date of Manufacture
- 1940-1953
- Maker / attribution
- Venner Ltd.
- Dimensions and Weight
- 175 mm x 130 mm x 100 mm, 1.55kg
Design
- Visible features
- • Cylindrical housing with transparent curved side wall revealing internal brass and steel gearing • Central threaded brass shaft extending upwards with a knurled disc collar • Engraved or printed labels on the top surface reading 'REGULATOR', 'HAND WIND', and 'SPECIAL TEST' • White accession number '1953-265' inscribed on the extended flat brass mounting plate • Grey two-core insulated electric wire with exposed copper leads at the end
- Identity and Classification
- The Science Museum Group catalogues this object as a synchronous motor driven clock movement with a 30 hours auxiliary spring reserve, identified as type ER. It is attributed to maker Venner Ltd. in New Malden, Kingston-upon-Thames, London, England, and dated to between 1940 and 1953 under accession number 1953-265. The museum catalogue lists the entry with two constituent parts: the movement itself under object number 1953-265/1 and four brass wood-screws under 1953-265/2. The overall dimensions and weight recorded in the museum record are 175 mm by 130 mm by 100 mm and 1.55 kg.
- Physical Housing and Visible Controls
- Visual examination reveals a cylindrical housing fitted with a transparent curved side wall displaying internal brass and steel gearing. This cylindrical body is attached to an extended flat brass mounting plate that is marked with the white accession number '1953-265'. The upper plate features engraved or printed labels reading 'REGULATOR', 'HAND WIND', and 'SPECIAL TEST', alongside a central threaded brass shaft extending upwards with a knurled disc collar. An insulated grey two-core electric wire extends outward from the assembly, terminating in exposed copper leads.
- Material Composition and Source Limitations
- The museum record documents the materials for the movement as brass (copper, zinc alloy), steel (metal), and unidentified plastic. While the transparent section exposes internal brass and steel components, the specific composition of the transparent polymer is not identified in the source. Although the record lists four brass wood-screws under object number 1953-265/2, these screws are not visible in the provided photograph of the movement. Furthermore, the operational functionality and 30-hour duration of the auxiliary spring reserve are catalogued claims rather than directly verified mechanical tests in this source.
Identification
- Reference
- type ER
- Object Number
- 1953-265
- 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: Source notes the museum lot includes four brass wood-screws (part 1953-265/2), which are not present in the photograph
- Research required: Specific plastic polymer is noted as unidentified by the source