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The Encyclopedia of Horology

Movement record · Switzerland

Patek Philippe 240

Partially verified

Micro-rotor

Technical specifications

Diameter
27.5 mm
Height
2.53 mm
Jewels
27
Frequency
21600 vph
Power reserve
48 h
Winding
Automatic
Setting
Stem
Escapement
Lever
Balance
Gyromax
Complications
None

Identification features

    Known variants

      Servicing notes

      Cleaning, lubrication, mainspring and pivot work belong with a qualified watchmaker working from calibre-specific documentation. Conserve original parts: replacing a worn component with a modern substitute changes the object, and refinishing plates or dials destroys evidence.

      General guidance only. Antique movements should be serviced by a qualified watchmaker.

      Historical significance

      Iconic thin automatic

      Related photographs

      Patek Philippe & Co. Yellow Gold Pocket Watch – Circa 1920
      Patek Philippe & Co. Yellow Gold Pocket Watch – Circa 1920 — WatchMuseum.org, © WatchMuseum.org, used with permission. WatchMuseum.org catalogue record
      Patek Philippe & Co. Yellow Gold Pocket Watch – Circa 1920
      Patek Philippe & Co. Yellow Gold Pocket Watch – Circa 1920 — WatchMuseum.org, © WatchMuseum.org, used with permission. WatchMuseum.org catalogue record
      Patek Philippe & Co. Yellow Gold Pocket Watch – Circa 1920
      Patek Philippe & Co. Yellow Gold Pocket Watch – Circa 1920 — WatchMuseum.org, © WatchMuseum.org, used with permission. WatchMuseum.org catalogue record

      No confidently matched photograph of this subject has been found yet. These photographs show a closely related record, and are not examples of the type described on this page.

      Sources & references

      1. de Carle, D., Watch and Clock Encyclopedia
      2. Period trade material catalogues and calibre reference compilations (edition-dependent)
      3. Published manufacturer technical documentation where available

      Where sources disagree, the disagreement is stated rather than resolved silently.