Hamilton Model 21 Two-Day Marine Chronometer No. 675
Record status
Individual type · partial
Period
c. 1941
This Hamilton Model 21 two-day marine chronometer, numbered 675 and dated circa 1941, was produced in Lancaster, Pennsylvania. It features a 4-inch silvered dial displaying Arabic numerals, an up-and-down state-of-wind indicator below 12 o'clock, and a subsidiary seconds dial above 6 o'clock inscribed with the maker and serial markings.
The instrument is mounted in a gimbaled brass bowl within a three-tier brass-bound wooden box equipped with external carrying handles. Its full-plate nickel-damascened movement is catalogued as having 14 jewels, a chain fusee with maintaining power, an uncut steel balance, a helical hairspring, and a spring detent escapement.
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
- Casing
- Fully gimbaled brass bowl in a three-tier brass-bound box with carrying handles
- Dial diameter
- 4 inches
- Place recorded
- United States
- Dial inscription
- Hamilton Lancaster, PA., U.S.A./N 675/1941
- Maker / attribution
- Hamilton Watch Co.
- Movement inscription
- Hamilton Watch Co. Lancaster, Penna. Model 21, 14 Jewels/N675-1941
- Escapement and balance
- Spring detent escapement with uncut steel balance and helical hairspring
Design
- Visible features
- • A visible crack runs across the glass bezel above the 8 and 9 o'clock positions. • The interior upper lid features an inspection or instructional label and a brass plaque reading 'HAMILTON WATCH CO.' • Gimbal locking and winding hardware are mounted in the wooden deck box corner and surround.
- Dial and Identity Markings
- The catalog records a 4-inch silvered dial with Arabic numerals, marked "Hamilton Lancaster, PA., U.S.A./N 675/1941,". The production location is stated by the auctioneer as Lancaster, Pennsylvania, dated circa 1941. Visible observation shows a state-of-wind indicator positioned below 12 o'clock and a subsidiary seconds subdial above 6 o'clock containing the maker and serial markings.
- Casing and Condition Observations
- The instrument is mounted in a fully gimbaled brass bowl featuring a screw bezel and is housed in a three-tier brass-bound box with carrying handles. Observations note gimbal locking and winding hardware situated in the corner and surrounding woodwork. Regarding physical condition, direct observation confirms a crack running across the glass bezel above the 8 and 9 o'clock positions, aligning with the cataloguer's note "glass cracked". The auctioneer also states that the "gimbal and brass bezel has lacquer loss and discolorization". Mounted to the interior of the upper lid are an instructional or inspection label and a plaque marked "HAMILTON WATCH CO.".
- Reported Movement and Internal Mechanics
- The movement is not depicted uncased in the listing photograph, so internal specifications rely on the auctioneer's cataloguing. The text describes a full-plate nickel-damascened movement marked in part "Hamilton Watch Co. Lancaster, Penna. Model 21, 14 Jewels/N675-1941,". Additional catalogued movement details include 14 jewels, a chain fusee with maintaining power, an uncut steel balance, a helical hairspring, and a spring detent escapement. Operationally, the cataloguer notes that the chronometer "ticks but does not stay running".
Identification
- Reference
- Model 21
- Serial number
- N 675
- 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 movement is not pictured outside the gimbal bowl, relying on auction cataloguing for escapement and train details.
- Research required: The cataloguer notes the glass is cracked and the chronometer ticks but does not stay running.