Important Modern & Vintage Timepieces
Hong Kong, May 10, 2020
LOT 110
Courvoisier Frères - Pocket watch with tourbillon; “Mobilis”; silver
HKD 7,800 - 9,400
USD 1,000 - 1,200 / EUR 950 - 1,100 / CHF 1,000 - 1,200
Sold: HKD 12,500
Silver (0.900), open-face, keyless-winding, round-shaped, pocket watch, with patented one-minute tourbillon regulator. Movement, 19’’’, inverted calibre, gilded brass, going barrel, straight-line lever escapement, bimetallic compensated balance with gold poising screws and blued steel flat hairspring set on the revolving carriage.
| Grading System | |
|---|---|
Grade: AA |
Very good |
Case: 4-12 |
Fair Worn |
Movement: 3-6 * |
Good |
Dial: 3-6-01 |
Good Slightly oxidized HANDS Original |
Brand Courvoisier Freres, La Chaux-de-Fonds
Model “Mobilis”
Year circa 1910
Movement No. 10 405
Case No. 817
Material silver
Diameter 52.8 mm.
Caliber 19’’’, straight-line lever escapement set on the revolving carriage
Signature movement
Accessories copy of the invention patent
Notes
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Tourbillon “Mobilis”
At the beginning of the 20th century, Paul Loichot, from Charquemont, Doubs (France), invented and patented in Switzerland an interesting tourbillon design (Swiss invention patent No. 30 754, delivered on June 11, 1904). He inverted the movement, allowing the carriage to be seen through the dial and placed the escapement in a straight line with lever having an opening for the carriage arbour.
Bibliography
Meis, Reinhard, Das Tourbillon, p. 310.