Important Modern & Vintage Timepieces

Hong Kong, Oct 27, 2019

LOT 382

PATEK PHILIPPE HISTORICAL KEYLESS -WINDING POCKET WATCH WITH PERPETUAL CALENDAR WITH MOON PHASES AND SECTORIAL EQUATION OF TIME; 18K PINK GOLD AND ENAMEL

HKD 1,050,000 - 1,200,000

CHF 131,000 - 160,000 / USD 132,000 - 165,000

Sold: HKD 1,240,000

18K pink gold and enamel, open-face, keyless-winding, round-shaped, pocket watch, with subsidiary seconds at 3 and six horological complications: • Instantaneous perpetual calendar • Date of the month (subsidiary dial at 6 o’clock) • Day of the week (subsidiary dial at 3 o’clock; indications given in Spanish) • Month of the year (subsidiary dial at 9 o’clock; indications given in Spanish) • Phases of the moon (aperture at 12 o’clock) • “Sector”-type equation of time (subsidiary dial at 12 o’clock) Case-back engraved in taille-douce (fine cut) with stylized foliage and black enamelled cypher.


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Grading System
Grade:
Case: 3

Good
Movement: 3*

Good

Overhaul recommended, at buyer's expense
Dial: 3-01

Good

HANDS Original

Brand Patek Philippe

Model Made for A. H. Rodanet, Constructeur de Chronomètres, Paris, No 9 294

Year Circa 1868-1870

Movement No. 31 090

Calibre  20’’’, lever escapement

Case No. 31 090

Diameter 55 mm

Signature Cuvette

Notes

Patek Philippe watches with equation of time In its first 150 years of activity, before the creation in the early 1980s of a series of six pocket watches made for Gübelin, Luzern / Lucerne, and for the Chronométrie Beyer, Zürich, and the elaboration of the four Calibre 89, the Patek Philippe manufacture did not produce than eleven watches with equation of time. The first (1865) being endowed with only an engraved table of equation of time table, either without a clock mechanism; the eleventh being the “Supercomplication” (1933) of Henry Graves Jr. (1868-1953), New York.The present watch is therefore the third watch ever made by Patek Philippe with this horological complication whose mechanism is fitted with a mobile making a single rotation per year (the cam equation of time). What is an equation of time The equation of time reflects the difference between the mean solar time and the true solar time; this one is variable over the course of a year. It is thus the difference between the time indicated by a sundial and that indicated by a perfectly regulated timepiece which would indicate midday at the time of the passage of the Sun to the meridian. This difference results from the combination of the effects of two characteristics of the movement of the Earth around the Sun: its elliptical orbit (rather than circular) and the inclination of its axis of rotation on the plane of the orbit. What is a “running”-type equation of time A type of display of the equation of time on a timekeeper. The solar time is permanently shown by a “sun” minute-hand, which revolves, following or preceding the regular mean time minute-hand. In this way, the mean time, the solar time and the increment of time separating them can be perceived all at once. What is a “sector”-type equation of time A type of display of the equation of time on a timekeeper. The solar time is permanently indicated by an index or a hand on a subsidiary dial graduated generally in a sector ranging from + 15 to - 15 minutes. To know the solar time, it is therefore necessary to add or remove this lapse of time at the mean time.