Important Modern & Vintage Timepieces

Hong Kong, Jul 23, 2020

LOT 7

L. C. Grandjean by LeCoultre & Co.
Large pocket watch, minute-repeater, triple date à guichet (with aperture), moon phases; 18K yellow gold

18K yellow gold, hunting-case, keyless-winding, round-shaped, large pocket watch, with subsidiary seconds at 6 and six horological complications:
• Minute-repeater on two steel gongs by two hammers (activated by the slide located on the case-band at 6 o’clock)
• 1/5 second chronograph (activated by the single rectangular- shaped push-piece located on the case-band at 12 o’clock) with outer ring divided in 300
• Half-instantaneous date of the month (subsidiary dial at 3 o’clock)
• Day of the week (subsidiary dial at 9 o’clock; indications given in English)
• Month of the year (aperture at 12 o’clock; indications given in English)
• Age and phases of the moon (subsidiary dial, graduated from 0 to 29 1⁄2, and aperture at 6 o’clock)
Cover and case-back polished.
Movement 20’’’, rhodium plated, going barrel, straight-line lever escapement, compensated balance with gold poising screws and blued steel hairspring with terminal curve, index regulator; repeater work; chronograph work on the top plate.

Brand L. C. Grandjean, Les Ponts-de-Martel, Le Locle

Year circa 1890

Movement No. 4 884

Case No. 4 884

Caliber 18’’’ (ebauche by LeCoultre & Co., Le Sentier, Vallée de Joux), lever escapement

Dimensions Ø 57.4 mm.

Signature cuvette (dome) by the retailer, movement (on the back- plate, under one of the hammer) by the maker

HKD 48,000 - 64,000

CHF 6,000 - 8,000 / USD 6,400 - 8,500


Grading System
Grade: AAA

Excellent

Case: 3-8

Good

Slightly scratched

Movement: 3-6*

Good

Slightly oxidized

Overhaul recommended, at buyer's expense

Dial: 3-77-01

Good

ENAMEL AND VARIOUS TYPES OF DECORATION Restored soft enamel

HANDS Original


Notes

Grandjean, L. C., Le Locle
Watchmaker active in Les Ponts-de-Martel, near Le Locle, who produced high-quality repeater watches from 1887 to 1905.
He also made watches fitted with a two-train movement, split-seconds chronograph and jumping 1⁄4ths of a second. The jumping seconds hand, also called “foudroyante” in French, indicates fractions of a second when the chronograph function is activated.