====== Eterna 1158 ======
[[Eterna]] **Cal. 1158** was one of a family of [[bumper]] [[automatic]] watch movements produced from [[1945]] to [[1948]].

===== 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. 1158 was an early [[bumper]] [[automatic]] movement, the first Eterna movement with [[direct seconds]]. It replaced the earlier [[Eterna 833|Cal. 833]] family.

===== Technical Details =====
This movement family includes 12.25 [[ligne]] and 13 ligne variants. Both are 5.75 mm thick, have 19 or 21 jewels, operate at 18,000 A/h, and have 42 hours of power reserve.

===== Variants =====
Cal. 1158 one of two similar movements.

  * Eterna 1158 - (1945-1948) 12.25 ligne
    * Eterna 1159 - (1945-1948) 13 ligne

===== See Also =====
  * [[Eterna-Matic]]
  * [[Eterna 833]], the predecessor movement
  * [[Eterna 1247]], the successor movement


{{tag>Movements Eterna_calibres Automatic_movements Bumper_automatic_movements}}