Important Modern & Vintage Timepieces

Hong Kong, Jul 23, 2020

LOT 6

Unsigned, attributable to LeCoultre & Co.
Pocket watch, linear digital triple date, so-called “American calendar”, moon phases; 18K pink gold

18K pink gold, open-face, keyless-winding, round-shaped, pocket watch, with subsidiary seconds at 6 and five horological complications:
  • Half-instantaneous calendar à guichets (with apertures), so-called Calendrier américain or Quantième en ligne (American Calendar or Linear Calendar)
  • Date of the month (aperture at 12 o’clock, in the centre)
  • Day of the week (aperture at 12 o’clock, on the left; indications given in French)
  • Month of the year (aperture at 12 o’clock, on the right; indications given in French)
  • Phases of the moon (aperture at 6 o’clock)
Case-back polished and engraved in taille-douce (fine-cut) with the cypher “N V”.
Movement 18’’’, rhodium plated, going barrel, gold train of wheels, gold screwed-chaton (setting) on the central wheel, straight-line lever escapement, compensated balance with gold poising screws and blued steel hairspring with terminal curve.

Brand Unsigned, Le Sentier (Vallée de Joux)

Year circa 1890

Movement No. 20 096

Case No. 20 096

Caliber 18’’’, lever escapement

Dimensions Ø 48.8 mm.

HKD 24,000 - 32,000

CHF 3,000 - 4,000 / USD 3,200 - 4,200


Grading System
Grade: AAA

Excellent

Case: 3

Good

Movement: 3*

Good

Overhaul recommended, at buyer's expense

Dial: 3-70-01

Good

ENAMEL AND VARIOUS TYPES OF DECORATION Hairline

HANDS Original


Notes

Linear digital triple date, so-called “American calendar”
The linear digital triple date is a calendar in which the date is displayed in a single aperture allowing for a clear dial which could be read at a glance. This type of display became popular in the Art Deco period and is most often found in watches destined for the Anglo-American market. This kind of calendar then became known as the “American Calendar” and was also produced by Patek Philippe after the Second World War under the references 725 and 699 or 844 (with minute-repeater).