Important Modern & Vintage Timepieces

Hong Kong, Jul 23, 2020


Ami Lecoultre
Movement, patented split-seconds chronograph with oscillating pinion and “foudroyante”, patented non-magnetic compensated balance; white metal

White metal, open-face, keyless-winding, round-shaped, pocket watch movement in a working-case, with three horological complications:
  • 1⁄4 second chronograph with oscillating pinion device (activated by the single push-piece located on the winding-crown)
  • Split-seconds (activated by the push-piece located on the case- band at 11 o’clock)
  • 1⁄4 of second, known as foudroyante seconds (subsidiary dial at 6 o’clock)
White enamel dial with radial Roman numerals. Blued steel “Pear” hands.
Movement 20’’’, 3⁄4 plate, rhodium-plated, going barrel, straight-line equilibrated lever escapement, patented non-magnetic platinum alloy and brass compensated balance with gold poising screws and blued steel hairspring with terminal curve, index regulator with swan-neck spring and precision-regulating device for fast / slow by means of an eccentric snail, adjusted.

Brand Ami Lecoultre, Le Brassus & Geneva

Year circa 1888

Movement No. 3 482

Caliber 20’’’, lever escapement

Dimensions Ø 47.1 mm.

Signature dial and movement

Accessories copies of the invention patents

HKD 72,000 - 96,000

CHF 9,000 - 12,000 / USD 9,500 - 12,700

Grading System
Grade: AAA


Case: 2

Very good

Movement: 2*

Very good

Overhaul recommended, at buyer's expense

Dial: 2-01

Very good

HANDS Original


Movement based on the American invention patent No. 355 403, delivered on January 4, 1887, to Ami LeCoultre, Le Brassus, for a “Stop Watch.”.
Metallic alloy of the balance based on the American invention patents No. 382 826 and No.
382 827, delivered on May 15, 1888, to Heinrich Ostermann, chemist, and Axel Prip, jeweller, Geneva, for a “Alloy.”, and also based on the American invention patents No. 388 145, No. 388 146 and No. 388 147, delivered on August 21, 1888, to Heinrich Ostermann, chemist, and Charles Lacroix, director of the Usine Genevoise de Dégrossissage d’or, Geneva, for a “Metallic Alloy.”.
Lecoultre, Ami
Charles-Ami Lecoultre-Piguet (1843-1921) began his career in Le Brassus as a manufacturer of complicated watches. In 1878, he exhibited a highly complicated watch at the Universal Exhibition in Paris. This watch, rewarded with a bronze medal, required four years of work and was made with Louis-Elisée Piguet (1836-1924), also from Le Brassus. The watch, known as “La Merveilleuse”, is today kept in the Musée International d’Horlogerie of La Chaux-de-Fonds (Inv. I-501).