====== IWC 79240 ======
The **79240** (and derivative **79340** and **79350**) is an [[automatic chronograph]] movement produced by [[IWC]] based on the [[Valjoux 7750]] [[ebauche]] since [[1998]].

===== Details =====
The [[Valjoux 7750]] movement was extremely important to the resurgence of [[IWC]] and the basic design remains in use today. The company has used it for many important innovations since the 1980's, including a [[perpetual calendar]], [[rattrapante]], and [[grande complication]]. The 7750 [[ebauche]] was used for the [[IWC 7900|790 family of movements]] and the basic architecture is the basis for today's [[IWC 69000|69000 family of movements]].

In [[1998]], IWC created a novel variant of the 7750 base. **Cal. 79240** dispenses with the calendar and most of the [[chronograph]] functions of the 7750, leaving only the 30 minute recorder at 12 00 and adding [[small seconds]] at 6 00 instead of the usual placement at 9 00. This modification was anything but simple, however. Relocating the running seconds required cutting away part of the movement base plate and adding an all-new bridge with three [[wheel]]s and a tension spring. Removing the calendar plate required the creation of a new plate to cover the [[gear train]]. And this modification did not make the movement thinner; it remains 7.9 mm thick. Like many 7750-derived IWC movements of this period, it features a [[Triovis]] regulator rather than the usual Valjoux Fine Regulator.

The movement is gold plated and finished by IWC, which also regulates it. In [[2006]] IWC began plating the movement in nickel rather than gold, renaming the movement **Cal. 79350**. This remains in production as of [[2019]].

Another variant of this movement was created in [[2003]]. **Cal. 79340** is similar to Cal. 79350 but lacks running seconds entirely.

Beginning in [[2018]], IWC is using their [[in-house]] [[IWC 69355|Cal. 69355]] in new models.

===== Movement Family =====
  * 79240 (1998-2005) - [[Small seconds]] at 6 00
  * 79340 (2003) - No small seconds
  * 79350 (2006-present) - Nickel plated

===== Applications =====
  * Cal. 79240
    * [[IWC Portugieser Chronograph 3714]] (1998-2006)
  * Cal. 79350
    * [[IWC Portugieser Chronograph 3714]] (2006-present)
    * [[IWC Ingenieur Chronograph 3725]] (2005-2008)


<WRAP ud ud_mov>

**Description:**
  * [[Automatic chronograph]] movement based on [[Valjoux 7750]]
  * Bi-directional winding

**Functions:**
  * Hours, minutes, [[chronograph seconds]] central
  * [[Small seconds]] at 6 00
  * [[Chronograph minutes|Chronograph 30 minutes]] at 12 00

**Data:**
  * Ø 30 mm
  * H 7.9 mm
  * 44 [[jewels]]
  * 28,800 A/h
  * [[Power reserve]] 44 hours

**Production period:**
  * [[1998]]-Present
  * Successor [[IWC 69355]]
</WRAP>

{{tag>Movements Valjoux_7750 Automatic_movements Automatic_chronograph_movements IWC_calibres}}