Longines brass deck chronometer with 21 jewels
Record status
Individual type · research required
Maker / issuer
LonginesThis object is a Longines deck chronometer measuring 3.5 inches in diameter by 0.75 inches deep, constructed of brass and wood. The chronometer is hinged inside a wooden box, allowing access to the reverse where the workings of the movement are visible.
The reverse of the movement is inscribed with "21 jewels" to indicate the number of jewels used, as well as serial number 2517360. The piece is preserved in the collection of the Curator Branch, Naval History and Heritage Command.
Evidence at a glance
- Linked sources
- 2
- 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.
Historical context
Longines, formally Compagnie des Montres Longines, Francillon S.A., is a Swiss watchmaker established in Saint-Imier, Switzerland, by Auguste Agassiz in 1832. The manufacturer produced precision timekeeping instruments, including deck chronometers crafted for naval service and navigation, prior to becoming part of the Swiss Swatch Group and its predecessors in 1983.
Physical characteristics
- Case
- Brass and wood; 3.5" Dia x 0.75" D; hinged in wooden box
- Material
- Brass (as described on the source photograph page)
Technical characteristics
- Movement
- 21 jewels
- Jewel count
- 21 jewels (as described by the source)
Identification
- Holding institution
- Curator Branch, Naval History and Heritage Command
- Inscriptions or signatures
- Inscribed on reverse: "21 jewels", serial number 2517360
- Serial or inventory number
- Serial# 2517360 / Accession: 2011-173-135
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
- Production date not documented by the source photograph; requires a manufacturer record or serial-number reference.
- Escapement type not documented; requires movement examination or a horological reference.
- Serial-number dating, case dimensions and weight remain untranscribed.
- No catalogue reference number is asserted; standard horological catalogues have not been transcribed for this specimen.