ERNEST GUINAND LARGE ONE-MINUTE TOURBILLON DETENT
ESCAPEMENT
Ernest Guinand, Le Locle, No.1061. Made circa 1867.
Extremely fine, rare and important 18k gold hunting-cased keyless pocket
Chronometer with one minute tourbillon regulator. Controled at the Neuchatel
Observatory in 1867.
Five body, massive, "bassine et filets", glazed cover for the movement
(glass missing).
Enamel with black roman numerals, outer minute track, sunk subsidiary
seconds. Blued-steel Breguet hands.
Rhodium plated with "fausses côtes" decoration, 15 jewels, pivoted detent
escapement, two armed cut bimetallic balance with gold poising screws,
blued steel balance spring with terminal curve and arc limiting pin.
Ernest Guinand first type polished steel tourbillon carriage, driven by the
minute wheel.