====== GP 3000 ======
{{wst>image_r|GP_3200|Calibre GP 3200}}
{{wst>image_r|GP_3300|Calibre GP 3300}}
===== Extra-flat calibre =====
In [[1994]] [[Girard-Perregaux]] introduces the 3000 family of ultra-thin [[self-winding]] movements. They are available in two calibres 10"'1/2 (23.30 mm) and 11"'1/2 (25.60 mm). The height varies depending on the version. These two powerful and reliable calibres also serve as a base for various [[complication]]s of Girard-Perregaux.

  *GP 3000, Ø 10"'1/2, height 2.98 mm
  *GP 3100, Ø 11"'1/2, height 2.98 mm
  *[[GP 3200]], Ø 10"'1/2, height 3.28 mm
  *[[GP 3300]], Ø 11"'1/2, height 3.28 mm

===== Ball bearings in ceramic =====
Since its introduction, [[ball bearing]]s are a weak point of the [[self-winding]] movements. Particularly at the lubrication of steel ball bearings, numerous problems can arise 

  * The oil could stick together during prolonged storage. Oil ages, so the ball bearings must be lubricated anew regularly.
  * The aging process and wear of the bearings is accelerated by a lack of lubrication.
  * Particle production can lead to contamination of the movement.
  * Risk of corrosion on contact between the bearing and balls.

To prevent these problems, Girard-Perregaux, in collaboration with a supplier, has developed [[ceramic]] ball bearings, which eliminate any lubrication and increase the efficiency of the movement.

===== Ebauche Variants =====
[[Vacheron Constantin]] also used this movement as their Cal. 1310 (GP 3100) and 1311 ([[GP 3200]]).


{{tag>Movements Automatic_movements Girard-Perregaux_calibres}}