====== Omega 1040 ======
**Calibre 1040** (and the similar **Calibre 1041**) is an [[Omega]] version of the [[Lemania 1341]] [[automatic chronograph]] movement.

===== History =====
Omega and [[Lemania]] jointly developed an [[automatic]] [[chronograph]] movement for introduction in [[1972]]. **Cal. 1040** would power the new [[Omega Speedmaster Mark III]], a range of models with modern [[tonneau]] cases to succeed the [[Omega Speedmaster Professional Mark II|Speedmaster Professional Mark II]]. The Mark III was produced with three different cases, eventually gaining the [[Omega Speedmaster Professional|Speedmaster Professional]] moniker. It would also power the [[Omega Speedmaster Professional Mark IV|Speedmaster Professional Mark IV]], introduced in [[1974]].

Cal. 1040 has an unusual arrangement of hands and subdials. It is a 2-[[subdial|register]] movement, with 4 central hands and subdials at 6 and 9 on the dial 

  * Center hour and minute hands, chronograph seconds, and 60 minute chronograph totaliser
  * 12-hour totaliser at 6 00
  * Small seconds and 24-hour day/night disc at 9 00
  * Date window at 3 00

Cal. 1040 was generally replaced by [[Omega 1045|Cal. 1045]], Omega's version of the [[Lemania 5100]], after [[1974]].

===== Calibre 1041 =====
The similar **Cal. 1041** was a [[chronometer]]-grade version of Cal. 1040 and was used in the [[Omega Speedmaster 125th Anniversary Chronograph]] in [[1973]].

===== Specifications =====
  * Diameter 13 3/4 ligne
  * Height 8 mm


{{tag>Omega_chronograph_calibres Automatic_chronograph_movements}}