Observatory Caliber A fine, heavy and large deck chronometer in a wooden...
Gehäuse
Base metal, tiered, glazed movement.|Very good.
Zifferblatt
Enamel.|Very good.
Werk
Bridge movement, lever escapement, Guillaume gold screw compensation balance, blued Breguet balance spring with 2 terminal curves by Phillips.|Very good, capable of running, cleaning recommended.
WERKNR:2971458
caliber:26.99
dimension:68 mm
circa:1913
weight:241
country:Switzerland
originalbox:
originalcertificate:
guaranteecard:
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This Longines chronometer movement participated in the 1920 Neuchâtel Observatory chronometer competition "Chronomètres de Poche 1re Classe" and, with a mean daily rate deviation of 0.17 seconds, achieved a score of A=13.70 points, placing 97th out of 162 chronometers in its category. In 1930, it successfully participated in the Geneva Observatory competition. The regulator in both cases was David Perret of St-Imier.Calibre 26.99 exists in one version as a bridge movement and in another with a central bridge, and it is reserved exclusively for use in the observatory competitions. While obtaining a coveted bulletin was initially pursued by LONGINES with a primarily commercial motivation, the company’s attitude toward the competitions shifted in the early 1920s toward a performance- driven participation, aiming for prizes and records that could strengthen the marketing of its commercial products. As a result, Calibre 26.99 remained exclusively within the regulation department, which submitted it to the observatory trials.Because of the larger dimensions of the movement, both the Guillaume balance and the mainspring barrel were enlarged accordingly. However, submissions in Neuchâtel are limited and focus mainly on the years 1924 and 1925. In Geneva, the calibre is entered until 1929.Source: ChronoHype Magazin No. 16
Gehäuse
Base metal, tiered, glazed movement.|Very good.
Zifferblatt
Enamel.|Very good.
Werk
Bridge movement, lever escapement, Guillaume gold screw compensation balance, blued Breguet balance spring with 2 terminal curves by Phillips.|Very good, capable of running, cleaning recommended.
WERKNR:2971458
caliber:26.99
dimension:68 mm
circa:1913
weight:241
country:Switzerland
originalbox:
originalcertificate:
guaranteecard:
servicecard:
extract:
accessories:
clasp:
This Longines chronometer movement participated in the 1920 Neuchâtel Observatory chronometer competition "Chronomètres de Poche 1re Classe" and, with a mean daily rate deviation of 0.17 seconds, achieved a score of A=13.70 points, placing 97th out of 162 chronometers in its category. In 1930, it successfully participated in the Geneva Observatory competition. The regulator in both cases was David Perret of St-Imier.Calibre 26.99 exists in one version as a bridge movement and in another with a central bridge, and it is reserved exclusively for use in the observatory competitions. While obtaining a coveted bulletin was initially pursued by LONGINES with a primarily commercial motivation, the company’s attitude toward the competitions shifted in the early 1920s toward a performance- driven participation, aiming for prizes and records that could strengthen the marketing of its commercial products. As a result, Calibre 26.99 remained exclusively within the regulation department, which submitted it to the observatory trials.Because of the larger dimensions of the movement, both the Guillaume balance and the mainspring barrel were enlarged accordingly. However, submissions in Neuchâtel are limited and focus mainly on the years 1924 and 1925. In Geneva, the calibre is entered until 1929.Source: ChronoHype Magazin No. 16
