====== ETA A08.L01 ======
The **ETA Valgranges A08.L01** is a [[column wheel]] [[chronograph]] watch movement developed for [[Longines]] but also used by [[Omega]].

Column wheel chronographs have traditionally been preferred to [[cam switching]] chronograph movements due to their smooth operation and perceived exclusivity. However, the world's leading automatic chronograph movement, the [[Valjoux 7750]] family from ETA has proven very popular, reliable, and affordable. In [[2006]], ETA created a new family of larger movements for OEM use. The family, called [[ETA Valgranges|Valgranges]], is based on the Valjoux 7750, though not all movements are chronographs. These saw modest adoption, but were not as popular as anticipated, especially in high-end watches.

Longines had been using ETA movements for a few decades, including a number designed exclusively for the brand. In [[2009]], Longines requested a column wheel chronograph movement for use in moderately-priced watches. The result, initially called **A08.231** and later named A08.L01, was introduced in [[2010]] as the Longines **L688**. It was later also used as the Longines **L788** and is the basis (with a [[Co-Axial escapement]]) for the [[Omega 3330]].

The A08.L01 is highly unusual since it is very closely related to the cam-switched ETA/[[Valjoux 7753]] but with the chronograph functions completely reworked with a column wheel mechanism, [[vertical clutch]] with [[oscillating pinion]], and novel self-adjusting two-armed reset hammer. La Joux-Perret produced similar column wheel 7750 movements for [[Hublot]], [[Graham]], [[Chopard]], [[Corum]], and [[Eberhard]]. [[Alfred Rochat]] also produced a column wheel variant of the 7750 for [[Chronoswiss]].

===== See Also =====
  *[[http://raulhorology.com/2013/03/the-eta-7750-with-a-column-wheel-introducing-the-longines-manufacture-calibre-l688-2/|The Column Wheel Chronograph- Introducing the Longines Manufacture Calibre L688.2]]


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**Description:**
  * [[Self-winding]] movement with unidirectional winding [[rotor]]
  * [[Chronograph]] with [[column wheel]]

**Functions:**
  * Hours, minutes
  * [[Small seconds]] at the 9 with [[hacking seconds]]
  * Date with [[quickset date feature]]
  * [[Chronograph]] 60-seconds chrono hand from the center, 30-minutes counter at 12 h, 12-hours counter at 6 h

**Production period:**
  * Since [[2010]]
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{{tag>Movements Automatic_movements Chronograph_movements Automatic_chronograph_movements ETA_calibres Column_wheel_chronograph_movements}}