====== Omega 3330 ======
**Calibre 3330** is an [[automatic]] [[chronograph]] movement by [[Omega]] based on the [[ETA 7753]] but with the addition of a [[column wheel]] chronograph switch and [[Co-Axial]] [[escapement]].

===== History =====
Omega had long depended on [[Lemania]] and [[Frederic Piguet]] to provide [[chronograph]] movements, but this began to change with the [[1999]] introduction of the [[Co-Axial]] [[escapement]]. Although Omega was able to modify the [[Piguet 1285]]-based [[Omega 3313|Cal. 3313]] to include the novel escapement, it was not an ideal movement and had gained a reputation as being somewhat troublesome. So Omega requested that in-house [[Swatch Group]] movement specialist [[ETA]] develop a new automatic chronograph movement with provision for the Co-Axial escapement.

Since ETA had already developed a [[column wheel]] variant of the [[Valgranges]] [[ETA A08.L01]] for [[Longines]], [[L688.2|Cal. L688.2]], this was a natural base for an advanced calibre for Omega. The result was Cal. 3330, which includes not only the column wheel mechanism and Co-Axial escapement but also a silicon balance spring. The movement is also a [[COSC]]-certified [[chronometer]].

===== Applications =====
Cal. 3330 has seen limited use in Omega watches

  * 2012 [[Omega Speedmaster Racing]]
  * 2014 [[Omega Speedmaster Mark II]]

===== External Links =====
  * [[http://grail-watch.com/2015/02/08/curious-case-column-wheel-valjoux-7750-variants/|The Curious Case of the Column Wheel Valjoux 7750 Variants]]


{{tag>Movements Omega_calibres Automatic_chronograph_movements Omega_chronograph_calibres Omega_Co-Axial_calibres}}