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Important Modern & Vintage Timepieces

Hong Kong, May 10, 2020

LOT 110

Courvoisier Frères - Pocket watch with tourbillon; “Mobilis”; silver

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.

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

HKD 7,800 - 9,400

USD 1,000 - 1,200 / EUR 950 - 1,100 / CHF 1,000 - 1,200

Sold: HKD 12,500


Grading System
Grade: AA

Very good

Case: 4-12

Fair

Worn

Movement: 3-6 *

Good

Dial: 3-6-01

Good

Slightly oxidized

HANDS Original


Notes

Movement based on the Swiss invention patent No. 30 754, delivered on June 11, 1904, to Paul Loichot, Charquemont, Doubs (France), for a “Montre”.

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TourbillonMobilis

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.

The “Mobilis” trade name was registered by Courvoisier Frères, La Chaux-de-Fonds, on July 4, 1905 (Swiss mark No. 19 062).

Bibliography

Meis, Reinhard, Das Tourbillon, p. 310.