Brand Patek Philippe, Geneva
Model ‘Chronographe quantième perpétuel’
Year circa 1988
Reference 3970 E J (2nd series)
Movement No. 875 128
Calibre CH 27-70 Q, manual-winding, 24 jewels
Case No. 2 840 110 (by Les Ateliers Réunis S.A., Geneva)
Material/s yellow gold (18-carat)
Bracelet brown leather PP strap
Buckle yellow gold (18-carat) pin-buckle, signed
Dimensions 36 mm. 43.4 x 36 mm.
Thickness 12.9 mm.
Signature dial, case and movement
Accessories Extract from the Archives Patek Philippe
Ref. 3970 E J (2nd series), chronograph, 30-minute counter, bissextile perpetual calendar, moon phases, AM-PM indication, screwed solid case-back, concave bezel, stepped lugs, silver ‘opalin’ opaline-white two-tone dial, lapidated indexes (1st type); --
A chronograph bissextile perpetual calendar wristwatch, with silver opaline-white two-tone dial and screwed case-back --
Yellow gold (18-carat), manual-winding, round-shaped, gentleman’s wristwatch, with subsidiary seconds at 9 o’clock and nine horological complications:
• 1/5 second chronograph with round-shaped push-pieces located on the case-band
• Half-instantaneous 30-minute counter (subsidiary dial at 3 o’clock)
• Half-instantaneous perpetual bissextile calendar à guichets (with apertures)
• Date of the month (subsidiary dial at 6 o’clock)
• Day of the week (aperture at 11 o’clock; indications given in English)
• Month of the year (aperture at 1 o’clock; indications given in English)
• Four-year cycle of leap-years (subsidiary dial at 3 o’clock)
• Phases of the moon (aperture at 6 o’clock)
• Diurnal (day-time) and nocturnal (night-time) hours with a 24-hour (AM-PM) scale (subsidiary dial at 9 o’clock) --
Case: two-piece, polished and satin-finished, rounded profile case-band extended by a concave stepped bezel, wide stepped lugs, screwed case-back; polished ‘Calatrava’ crown. Dial: silver ‘opalin’ opaline-white colour, two-tone, with yellow gold applied radiating ‘Bâton’ indexes (at 1, 2, 4, 8, 10 and 11 o’clock) and square pyramidal-shaped indexes (at 3, 5, 7 and 9 o’clock); yellow gold ‘Feuille’ leaf-shaped hands. Movement: calibre CH 27-70 Q, manual-winding, 24 jewels, rhodium-plated with ‘fausses côtes’ decoration, going barrel, straight-line lever escapement, free-sprung Gyromax balance, self-compensating Breguet hairspring, adjusted to heat, cold, isochronism and 8 positions, Geneva Quality Hallmark (“Poinçon de Genève” / Geneva Seal); chronograph work on the top plate; calendar work on the main plate, under the dial. --
The Extract from the Archives, dated March 3rd, 2016, mentions that this watch was made in 1988 and sold on March 17, 1988.
