The Longitude at the Eve of the Third...
Geneva, Hotel Des Bergues, Oct 23, 1999
LOT 26
Louis Berthoud, Paris, circa 1800.Very fine mahogany 15 going, centre seconds, long case regulator with unusual Fast/Slow precision adjustment
CHF 100,000 - 120,000
C. Rectangular with glazed door and side panels, ogee pediment with dentilled frieze. D. White enamel with Roman numerals and outer Arabic minutes and seconds rings. Gilt brass interlaced hands. M. Weight driven brass rectangular with cylindrical pillars, Graham escapement with micrometric adjustment fitted on the back plate, second beating gridiron pendulum with knife edge suspension and highly unusual subsidiary Fast-Slow precision adjustment.Signed on the dial.Dim. 195 x 53 x 28 cm.
| Grading System | |
|---|---|
Grade: AAA |
Excellent |
Case: 3 |
Good |
Movement: * 3 |
|
Dial: 4 - 01 |
Notes
This top quality regulator is remarkable by its highly unusual, exclusive precision adjustment. It is illustrated by J.-C. Sabrier: La Longitude en Mer à l'Heure de Louis Berthoud et Henri Motel, Antiquorum Editions, Genève 1993, p. 170, fig. 54.