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Patek Philippe Calatrava ref. 2508 'Waterproof', 'Series 1A' Dial — view 1 of 6
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Wristwatches · Wristwatch

Patek Philippe Calatrava ref. 2508 'Waterproof', 'Series 1A' Dial

DocumentedDocumented from a dealer's listing; attribution and date as stated by the dealer.
Maker / attribution
Patek Philippe (maker)
Date
c. 1955
Country of origin
Switzerland
Object type
Wristwatch
Dimensions
Case 35 mm
Stock no.
OC3012
Credit line
Dealer listing, Oliver & Clarke (OC3012)
Catalogue title (original)
Patek Philippe Calatrava Ref. 2508 'Waterproof' - 'Series 1A' Dial w/ Extract (English)

View the source record (dealer listing) ↗ (opens another website in a new tab)Suggest a correction

Record summary

Catalogued by Oliver & Clarke (dealer), United Kingdom (stock number OC3012), this is a wristwatch by Patek Philippe, made in Switzerland, dated c. 1955. The Atlas places it in the Modern Mechanical Horology period (1945 – 1969) of its Wristwatches collection. Recorded dimensions: Case 35 mm. The record is illustrated with 6 photographs.

Assembled from the source record's structured fields. Dates and attributions are given as the source states them; where a field is missing the Atlas leaves it blank rather than estimating.

Catalogue description

Dealer description — Oliver & Clarke

The Patek Philippe Calatrava. Arguably the brands most iconic model line, and purest expression of the brand. Their raison d'etre if you will. The line has been a hit since its debut in 1932. So much so, that the name "Calatrava" itself has become something of a byword within the watch industry for traditionally styled, no-frills dress watches that simply tell the time. Over the course of its nearly 100-years of production, there have been seemingly countless iterations within the line, with variations in the metal they are made in, with their size, dial configurations, and eventually, complications. And then, there is this: the Calatrava Reference 2508. First offered in 1951, it has become one of the more sought-after, collectible, and best-regarded time-only Calatravas ever produced. Why? As you'd expect, there are a few reasons: The case, which by the way, bears a strong resemblance to the 1463 chronograph, is designed by Taubert and features a 'waterproof' design with a screw-down caseback and comes in at a virtually perfect 35mm in diameter. The dial offerings are all exquisitely crafted, beautifully designed, and features some of the most timeless and stylish applied indices ever. Last but not least, the movement is one of Patek's finest time-only movements ever made, the Calibre 27 SC. The example that we have here dates to circa 1955 and is crafted out of yellow gold and houses what is known as a 'Series 1A' dial. The overall condition is formidable. All aspects of the case and 'stepped' bezel are beautifully preserved, with clear hallmarks, correct finishing and proportions, and showing just normal wear for its age. The dial inside, thankfully, is in equally well-preserved condition. The desirable applied yellow gold 'stud' and 'dart' indices are complimented by a yellow gold 'dauphine' handset and central seconds hand. This example comes fitted to a signed brown leather strap with a correct, matching 'PP&Co.'-signed yellow gold buckle by 'AW' and an extract from Patek's archives confirming production in 1955 and its original sale in 1956. There are watches, and then there are watches! This is one of the latter.

Historical context

Modern Mechanical Horology (1945 – 1969)

Tool watches for divers, pilots and astronauts; electric watches anticipate the electronic age.

The classic era of the mechanical wristwatch: dive watches, chronographs for motor racing and space flight, GMT watches for jet travel, slim dress watches, automatic calendars, and the rise of Japanese manufacturers alongside Swiss, American, German and Soviet industries.

Read the period in the timelineMore wristwatches from this periodEarlier: Golden Age of Mechanical Watchmaking

Atlas type guide

Dive and water-resistant watches

Keeping water and dust out of a wristwatch was a long-standing challenge. Rolex's screw-down Oyster case (1926) and Omega's Marine (1932) were landmarks; in the early 1950s Blancpain's Fifty Fathoms and Rolex's Submariner defined the professional dive watch with rotating bezels for timing dives, luminous dials and high water resistance. The ISO 6425 standard (1982) later codified what a 'diver's watch' must do.

Dive watches became icons of post-war design and exploration, and their evolution — helium escape valves, ceramic bezels, saturation-diving depth ratings — records the history of underwater work.

What to look for

  • Unidirectional or bidirectional rotating bezel with minute markings.
  • Screw-down crown and case back; depth rating printed on the dial.
  • Luminous hands and markers (radium before c. 1960, tritium c. 1960–1998, then Super-LumiNova).
  • Reference numbers on the case between the lugs or inside the back.

Dating clues

  • Screw-down Oyster cases: from 1926.
  • Professional dive watches: from 1953.
  • Tritium 'T' marks on dials: c. 1960–1998.

General guidance written by the Atlas editors about this kind of object. It is not a statement about this particular piece; for that, rely on the source record above and on physical examination.

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