Important Modern & Vintage Timepieces
Monaco, Jul 19, 2022
LOT 19
HOROLOGICAL SCHOOL OF VALLEE DE JOUX
POCKET CHRONOMETER, ONE-MINUTE TOURBILLON REGULATOR, “AUGUSTE GUIGNARD”-TYPE CARRIAGE, LATERAL LEVER ESCAPEMENT, GUILLAUME BALANCE; SILVER
EUR 14,900 - 24,900
USD 15,700 - 26,200 / HKD 124,000 - 206,000 / CHF 15,000 - 25,000
Sold: EUR 19,500
Silver (0.925), open-face, keyless-winding, round-shaped, massive pocket chronometer, with subsidiary seconds at 6 and a one-minute tourbillon regulator.
White enamel dial, with radial Roman numerals; blued steel “Spade” hands.
Case-back polished; hinged cuvette (dome) polished.
Movement 22’’’, rhodium-plated, going barrel, gold train of wheels, gold screwed-chaton (setting) on the central wheel, three-arm equidistant “Auguste Guignard”-type carriage, with lateral lever escapement, cut bimetallic brass-Invar compensated Guillaume balance with gold poising screws and blued steel hairspring with Phillips terminal curve and amplitude control device, gold screwed-chaton end-stone, polished steel index-regulator
White enamel dial, with radial Roman numerals; blued steel “Spade” hands.
Case-back polished; hinged cuvette (dome) polished.
Movement 22’’’, rhodium-plated, going barrel, gold train of wheels, gold screwed-chaton (setting) on the central wheel, three-arm equidistant “Auguste Guignard”-type carriage, with lateral lever escapement, cut bimetallic brass-Invar compensated Guillaume balance with gold poising screws and blued steel hairspring with Phillips terminal curve and amplitude control device, gold screwed-chaton end-stone, polished steel index-regulator
| Grading System | |
|---|---|
Grade: AAA |
Excellent |
Case: 2 |
Very good |
Movement: 2* |
Very good Overhaul recommended, at buyer's expense |
Dial: 2-01 |
Very good HANDS Original |
Brand Horological School of Le Sentier, Le Sentier (Vallée de Joux)
Year circa 1930
Movement No. unnumbered
Case No. unnumbered (probably later, from the 1950-1960’s)
Diameter 62 mm.
Caliber 22’’’, one-minute tourbillon regulator, “Auguste Guignard”-type carriage // “Le Sentier”-type carriage, lateral lever escapement
Weight 237.6 gr. (approx.)
Notes
Bibliography
· Meis, Reinhard, Das Tourbillon. Faszination der Uhrentechnik, Munich, Editions Laterna magica, 1986, pp. 45-46, ill. 56 and 57, p. 188, ill. 216-219, p. 189, ill. 220-221.
· Meis, Reinhard, Le Tourbillon, Fascination de la technique horlogère, Paris, Editions de l’Amateur, 1990, pp. 45-46, ill. 56 and 57, p. 188, ill. 216-219, p. 189, ill. 220-221.
· Meis, Reinhard, Das Tourbillon. Faszination der Uhrentechnik, Munich, Editions Laterna magica, 1986, pp. 45-46, ill. 56 and 57, p. 188, ill. 216-219, p. 189, ill. 220-221.
· Meis, Reinhard, Le Tourbillon, Fascination de la technique horlogère, Paris, Editions de l’Amateur, 1990, pp. 45-46, ill. 56 and 57, p. 188, ill. 216-219, p. 189, ill. 220-221.