John Poole Two-Day Marine Chronometer No. 1064
Record status
Individual type · partial
Period
c. 1846
According to the seller, this two-day marine chronometer by John Poole of London, numbered 1064, dates to circa 1846 and is housed in a three-tier brass-bound mahogany box.
The case features brass corners, a brass serial plaque reading 1064, and decorated escutcheons. Dealer documentation reports that the movement features a full brass plate, chain fusee, four ringed pillars, ten jewels, and Harrison's maintaining power. It utilizes an Earnshaw-type spring detent escapement with a split bimetallic balance, wedge-shaped compensation weights, a blued steel helical balance spring, and a faceted diamond endstone.
The 3 3/4-inch silvered dial carries Roman numerals, subsidiary seconds, and an up/down state-of-wind indicator.
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
- Two-day marine chronometer
- Escapement
- Earnshaw-type spring detent escapement
- Place recorded
- United Kingdom
- Maker and Serial
- John Poole, London, No. 1064
- Case Construction
- Three-tier mahogany brass-bound box
- Dial Specifications
- 3 3/4-inch dial signed Poole, London
- Maker / attribution
- John Poole
Design
- Visible features
- • Three-tier mahogany chronometer box with brass corner brackets and brass side straps. • Central rectangular brass plaque on the middle tier engraved with the numeral '1064'. • Star-shaped scalloped brass escutcheon on the lower section holding a key adorned with a yellow tassel. • Matching scalloped brass escutcheon or push-button fixture positioned centrally above the number plaque.
- Housing and External Features
- The instrument is contained within a three-tier mahogany box featuring brass corner brackets and side straps. A rectangular brass plaque on the middle tier is engraved with the serial number '1064'. The base of the case incorporates a scalloped brass escutcheon, and a central brass 'push-button' fixture is positioned on the middle section to facilitate opening the third tier.
- Dial and Visual Identification
- The 3 3/4-inch dial is silvered and signed 'Poole, London'. It features Roman numerals, original brass hands, and subsidiary indicators for seconds and state-of-wind. The serial number '1064' is engraved within the seconds ring of the dial.
- Movement and Escapement Configuration
- According to dealer information, the movement consists of a full brass plate with a chain fusee, four ringed pillars, and ten jewels, utilizing Harrison’s maintaining power. The mechanism is housed in a lacquered brass bowl with a screw-down bezel, suspended by a pivoted gimbal system with a knurled locking screw. The chronometer employs an Earnshaw-type spring detent escapement. Temperature compensation is provided by a split bimetallic balance with wedge-shaped weights, a blued steel helical balance spring, and a faceted diamond endstone.
Identification
- Serial number
- 1064
- 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 internal movement, gimbal mount, and dial are not visible in the provided exterior photograph; their descriptions rely entirely on dealer statements.