COURVOISIER - EXCEPTIONAL MINUTE REPEATING GUINAND
TYPE 1 TOURBILLON CHRONOMETER WITH INDEPENDENT DEAD SECONDS
Courvoisier Frères, La Chaux-de-Fonds, No. 22911, Type 1 carriage by Ernest Guinand. Made circa 1870.
Exceptionally fine and probably unique, large and heavy, minute-repeating, two-train, independent
dead-center seconds, 18K gold hunting-cased keyless pocket chronometer, with one-minute tourbillon
regulator with pivoted detent escapement and amplitude-controlling device.
Five-body, all hinged, "bassine et filets", master mark "PM", engine-turned with polished borders,
reeded band, button at 6 in the band for the independent seconds. Hinged gold cuvette engraved
with the prize medals for the Expositions Universelles of 1862 and 1867, further glazed gold-rimmed
cover over the movement.
White enamel, bold radial Roman numerals, outer minute track, subsidiary sunk seconds. Elaborate
pierced blued steel hands.
44 mm.(19 1/2'''), nickel, fausses côtes decoration, twin barrels with differential winding, gold
train, Guinand 1 type carriage (Meis classification) with pivoted detent Chronometer escapement,
cut bimetallic compensation balance with gold screws, Breguet blued steel balance spring with
perpendicular stud for preventing excessive amplitudes, index regulator with scale plate, entire train
jeweled, repeating on gongs activated by a slide on the band.