GUB Ship's Chronometer
Record status
Individual type · partial
Period
circa 1963
This GUB ship's chronometer, produced in the GDR around 1963, features a brass movement with a steel band and fusee, calibre 100. It utilizes an Earnshaw chronometer escapement and a Grießbach-balance equipped with a cylindric hairspring.
The timepiece is housed in a two-piece, facetted-glazed mahogany box with side carrying handles. A cardanic suspended brass case is fixed over the bezel. The silvered dial displays Roman numerals and includes a 56-hour power reserve indicator positioned at 12 o'clock, complemented by a large eccentric seconds sub-dial at 6 o'clock. The instrument is accompanied by its original transport box and a watch rate certificate.
The overall condition is reported as level 2.
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
- around 1963
- Type
- Marine chronometer
- Balance
- Grießbach-balance
- Calibre
- 100
- Condition
- 2
- Escapement
- Earnshaw chronometer-escapement
- Box Dimensions
- approx. 24 x 24 x 23 cm
- Place recorded
- GDR
- Maker / attribution
- GUB (Glashütter Uhrenbetriebe)
Design
- Visible features
- • The wooden box features a brass plaque labeled 'Präzisionsinstrument' with transport instructions • The interior of the instrument is visible through the top glazed panel of the box • A certificate is included with the chronometer • The box includes a metal tag bearing the maker's name and the serial number 7850
- Case and Presentation
- The chronometer is enclosed within a two-piece, facetted-glazed mahogany transport box, designed with handles on the sides for portability. This arrangement protects the inner mechanism while allowing visibility of the dial through the glass top. The exterior of the box features a prominent metal warning plaque, which serves as a cautionary label regarding the careful transport of the precision instrument, including warnings against sharp turns or hard impacts. Internally, the timepiece is secured within a brass casing that is suspended in a cardanic mounting, which is fastened over the bezel. This specialized housing is intended to maintain the chronometer in a level position during maritime use, mitigating the effects of ship movement on timekeeping precision.
- Movement and Mechanics
- The internal mechanism is a brass movement featuring a steel band and fusee construction, identified as calibre 100. Its regulation is managed through an Earnshaw chronometer escapement paired with a Grießbach-balance, which features a cylindric hairspring. The timekeeping interface is a silvered dial featuring Roman numerals. Functional indicators include a 56-hour power reserve display located at the 12 o'clock position and a large eccentric seconds dial positioned at 6 o'clock.
- Provenance and Documentation
- The instrument is catalogued with the serial number 7850, as indicated on the manufacturer's plaque affixed to the mahogany box. The set is accompanied by its original transport box and a watch rate certificate, providing a documented history of its production and testing. The attribution of the object to the GDR around 1963 is confirmed by the maker's mark for Glashütter Uhrenbetriebe.
Identification
- Serial number
- 7850
- 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 auction description recommends an overhaul at the buyer's expense
- Research required: The extent of the patina on the dial is not fully detailed beyond a descriptive mention