====== Eterna 833 ======
[[Eterna]] **Cal. 833** was one of a family of [[bumper]] [[automatic]] watch movements produced from [[1941]] to [[1944]].

===== Overview =====
[[ETA]] was one of the three firms "chosen" to develop advanced [[automatic]] watch movements by [[Ebauches SA]], thanks in part to their history with [[Eterna]]. The chief designer at ETA, [[Heinrich Stamm]], had created many of the company's important watch movements, and was famous for the [[Eterna-Matic]] line of watches.

Cal. 833 was an early [[bumper]] [[automatic]] movement. It was replaced by the [[direct seconds]] [[Eterna 1158|Cal. 1158]] family. Cal. 833 was based on the hand winding [[Eterna 905|Cal. 905]].

===== Technical Details =====
This movement family includes 11.75 [[ligne]], 12.25 ligne, and 13 ligne variants. Those with [[sub seconds]] are 5.4 mm thick, while those with [[sweep seconds]] are 5.55 mm thick. All have 17, 19, or 21 jewels, operate at 18,000 A/h, and have 38 hours of power reserve.

===== Variants =====
Cal. 833 one of a family of similar movements.

  * Eterna 833 - 11.75 ligne, [[central seconds]], 5.55 mm
    * Eterna 835 - [[sub seconds]], 5.4 mm
  * Eterna 834 - 12.25 ligne, sub seconds, 5.4 mm
  * Eterna 1076 - 13 ligne, sub seconds, 5.4 mm
    * Eterna 1077 - central seconds, 5.55 mm

===== See Also =====
  * [[Eterna-Matic]]
  * [[Eterna 905]], the base movement
  * [[Eterna 1158]], the successor movement


{{tag>Movements Eterna_calibres Automatic_movements Bumper_automatic_movements}}