====== PP 23-300 ======
Calibre **23-300** is an [[hand-wound]] watch movement from [[Patek Philippe]].

This is a common and respected small, thin manual movement from [[1956]] through [[1975]].

===== Info =====
As the name implies, Cal. 23-300 is 23 mm (10 [[ligne]]) in diameter and 3 mm tall. This compact size made it ideal for the popular [[Patek Philippe Calatrava]] and similar smaller watches produced in the 1950's and 1960's.

Cal. 23-300 is classic in layout, with a barrel bridge covering the ratchet and crown wheel, a curved center wheel bridge, and separate cocks for the fourth and escape wheel. It was derived from the preceding [[PP 10-200|Cal. 10-200]] but with many modifications. It is notable in that it is equipped with both an [[overcoil]] [[hairspring]] and a [[free-spring]] [[Gyromax]] balance, a combination not found in any other 10 ligne Patek Philippe movement.

This movement is greatly respected today, with many saying it is one of the best hand-wound movements ever produced by Patek Philippe. Carlos Perez said it "represents both the technical and artistic peak of Patek's 10 ligne handwinds, as the [[PP 27-400|27-AM 400]] was the peak of their 12 lignes."

===== References =====
Cal. 23-300 was used in many watches, including the following popular references 

  * [[Patek Philippe Calatrava 2573]]
  * [[Patek Philippe Calatrava 2574]]
  * [[Patek Philippe Calatrava 2592]]
  * [[Patek Philippe Calatrava 2593]]
  * [[Patek Philippe Calatrava 3468]]
  * [[Patek Philippe Calatrava 3537]]
  * [[Patek Philippe 2594]]
  * [[Patek Philippe Square 3405]]
  * [[Patek Philippe Ellipse 3548]]
  * [[Patek Philippe Ellipse 3648]]

===== See also =====
  * [[PP 10-200]], the predecessor
  * [[PP 175]] and [[PP177]], the successor

<WRAP ud ud_mov>
**Description:**
  * [[Hand-wound]] movement

**Functions:**
  * Hour/minute hands
  * Optional small seconds

**Data:**
  * 21,600 A/h
  * 23 mm wide, 3 mm high
  * 18 [[jewels]]
  * [[Geneva Seal]]

**Production period:**
  * [[1956]]-[[1975]]
</WRAP>

===== External Links =====
  * [[http://watchguy.co.uk/service-patek-phillipe-2588-calibre-23-300/|Service: Patek Phillipe 2588 calibre 23-300]]

{{tag>Movements Manual_winding_movements Patek_Philippe_calibres}}