Omega Observatory Chronometer Calibre 60.8
Record status
Individual type · partial
Period
circa 1930
Maker / issuer
OmegaThis large open-face observatory chronometer measures 74 mm in diameter and is cased in chrome-plated brass with a glazed screw-down back. According to auction records, the watch dates to circa 1930 and is powered by the 60.8 mm half-plate calibre, fitted with a 24 mm Guillaume gold screw compensation balance and a blued balance spring with a Phillips terminal curve.
The white enamel dial features black Arabic numerals, an outer railway minute track, blued steel hands, and a sunken subsidiary seconds register at 6 o'clock. The source states this movement competed in the 1930 Neuchâtel Observatory timing trials.
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
- Observatory chronometer
- Balance
- 24mm Guillaume gold screw compensation balance
- Calibre
- Cal. 60.8
- Regulator
- Gottlob Ith in Biel
- Dimensions
- 74 mm
- Case Material
- Chrome-plated brass
- Dial Material
- Enamel
- Place recorded
- Switzerland
- Movement Number
- 6999766
- Maker / attribution
- Omega
Design
- Visible features
- • White enamel dial with painted black Arabic hour numerals and an outer railway minute track. • Blued steel spade hour hand, pointer minute hand, and counterbalanced subsidiary seconds hand. • Fluted gold-toned winding crown within a round bow at 12 o'clock. • Sunken sub-seconds dial marked with Arabic numerals at ten-second intervals up to 60. • Omega brand name and Greek letter logo printed in black below 12 o'clock.
- Observatory Provenance
- According to source-reported data, this movement participated in the 1930 Neuchâtel Observatory 'Chronomètres de Bord' competition, where it achieved an average daily rate deviation of 0.11 seconds. The movement's regulator is identified as Gottlob Ith in Biel. The lot includes a certified copy of the original Bulletin de Marche from the Neuchâtel Observatory, dated 15 May 1930.
- Technical Configuration
- This large open-face observatory chronometer is powered by the Omega 60.8 calibre, a half-plate movement produced as part of a limited series of 88 pieces between 1925 and 1930. The movement is specified to include a 24 mm Guillaume gold screw compensation balance paired with a blued balance spring featuring a terminal curve. The timepiece is housed in a 74 mm chrome-plated brass case, which features a glazed screwed back. The watch, identified by movement number 6999766, weighs approximately 318 grams.
- Dial and Visual Observations
- The watch features a white enamel dial with black Arabic numerals and an outer railway minute track. Branding includes the Omega name and Greek letter logo printed in black below the 12 o'clock position. Timekeeping is indicated by blued steel spade hour and pointer minute hands, supplemented by a counterbalanced subsidiary seconds hand within a sunken register at 6 o'clock. A fluted gold-toned winding crown is positioned within a round bow at 12 o'clock.
Identification
- Serial number
- 6999766
- 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: Movement and glazed screw back are reported by the source catalogue but not visible in the supplied frontal photograph.
- Research required: Historical participation in the 1930 Neuchâtel Observatory contest and regulator attribution are source-reported.