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  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
  • Patek Philippe Calatrava 18K Gold Vintage Watch , calibre 175,ref. 3520
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Patek Philippe Calatrava Ultra-Thin 18k Gold / ref. 3520 / Vintage 1960's / Patek Philppe Box

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MODEL: Patek Philippe Calatrava Ultra-Thin 18k Gold / ref. 3520

ADDITIONAL INFO: The Patek Philippe Ultra-thin Hand-wound:
The enthusiasm for marrying function and style paved the way for the rise of ultra-thin watchmaking in the 1950s and 1960s. Patek Philippe’s response was the Calatrava ref. 3520 in 1965. It was characterised by a Clous de Paris, or hobnail bezel and advertised as “the flattest waterproof watch in the world” at the time of its introduction.
Over the course of its 25-year production, it was powered by the calibre 175 and subsequently the 177 in 1977. Both movements were derived from the ultra-thin and compact Frederic Piguet calibre 21 which was the prototypical ultra-thin manual movement that dates from the dawn of wristwatches and was adapted by a wide variety of brands ranging from Cartier to Rolex. It measured 9-ligne in diameter and was either 1.75mm or 1.77mm high. The calibre is notable for both its conventionally solid and aesthetically pleasing construction despite being under 2 mm.
It is distinguished by its Lépine construction whereby the fourth wheel is positioned at nine o'clock in line with the winding stem, with the balance in turn mounted on the right.
Thus, due to the atypical position of the fourth wheel, the subsidiary seconds hand was often omitted in the watches it inhabited, and central seconds was avoided to preserve the original intent of the calibre, which was slimness.
The movements offered a power reserve of approximately 42 hours and were fitted with a Gyromax balance that ran at 2.5 Hz in the cal. 175, while the cal. 177 beats at a more modern 3 Hz"

MOVEMENT: High-grade Ultra-thin movement caliber 175 nickel-finished lever movement, 18 jewels, Breguet hairspring. Adjusted to heat, cold, isochronism & 5 positions

SERVICE: This watch was professionally fully serviced. Last service will be remarked on the invoice.

YEAR: 1960s

DIAL: Beatifule Patek Philippe Dial

CASE: Patek Philippe 18k solid gold case in very good condition Oryginalna korona Patek Philippe

DIAMETER: without crown 31mm / 1.22 inch

WATER-TIGHTNESS: Splash Water Resistant (handwashing ok, not showering)

STRAP: New leather strap - Model wrist size on the photo is 18 cm - 7,08 inch

BOX: Shipping including beautiful Patek Philippe wooden box.

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