Geneva, Nov 05, 2023
LOT 335
C. PROST, SWITZERLAND, ONE-MINUTE GUINAND TYPE III TOURBILLON REGULATOR MADE IN VEVEY, YELLOW GOLD
CHF 20,000 - 40,000
EUR 21,100 - 42,100 / USD 22,200 - 44,300 / HKD 174,000 - 348,000
A very fine and important, 18k yellow gold, manual wind hunting cased pocket chronometer with one minute tourbillon regulator with type 3 carriage by Ernest Guinand
| Grading System | |
|---|---|
Grade: |
|
Case: 3 |
Good |
Movement: 3 |
Good |
Dial: 3-01 |
Good HANDS Original |
Brand C. Prost, Switzerland
Year Circa 1890
Case No. 3071
Diameter 52
Caliber 19''', nickel-plated, gold wheel train, 15 jewels in gold châtons, straight line lever escapement, cut bimetallic compensation balance with gold screws, blued steel Breguet balance spring with Phillips curv, Guinand type III polished steel tourbillon carriage with gold index scale and amplitude-controlling device.
Signature Dial and movement
Notes
Ernest Guinand (c. 1810-1879).
Guinand was an important Master Horologist from Le Locle, who, along with Auguste Grether from Ponts-de-Martel (1817-1879), specialized in the production of tourbillon carriages. According to the records of the Neuchâtel Observatory, Guinand's production of tourbillons began between 1865 and 1867. He designed three models of Tourbillon carriages, always based on an A-shaped frame. He worked for several important makers, including Girard-Perregaux and Montandon. Most of Guinand's carriages were equipped with a pivoted detent escapement, one with spring detent and some with lever escapement. Most of his carriages were not signed and can only be identified by their characteristic A-shape. In 1864 Patek Philippe chose him to build their first tourbillon regulator.
Guinand was an important Master Horologist from Le Locle, who, along with Auguste Grether from Ponts-de-Martel (1817-1879), specialized in the production of tourbillon carriages. According to the records of the Neuchâtel Observatory, Guinand's production of tourbillons began between 1865 and 1867. He designed three models of Tourbillon carriages, always based on an A-shaped frame. He worked for several important makers, including Girard-Perregaux and Montandon. Most of Guinand's carriages were equipped with a pivoted detent escapement, one with spring detent and some with lever escapement. Most of his carriages were not signed and can only be identified by their characteristic A-shape. In 1864 Patek Philippe chose him to build their first tourbillon regulator.