====== Zenith 400B ======
Calibre **400B** is an [[automatic]] [[chronograph]] movement from [[Zenith]]. Released in the 1990's, this was one of the first modifications to the classic [[Zenith 3019PHC|El Primero movement]].

===== Overview =====
Because of the unconventional 4 30 date window placement in the classic El Primero movement (now known as Cal. 400), Zenith created a new calibre, **Cal. 400B**, which moved the date to the 6 00 position. This modification required much reengineering of the movement, resulting in a jump in component count from 278 to 328.

Cal. 400B was also produced in titanium.

===== See Also =====
  * [[Zenith 400]]
  * [[Zenith El Primero]]
  * [[Zenith El Primero calibres]]
  * [[Zenith El Primero watches]]

<WRAP ud ud_mov>
**Description:**
  * [[Self-winding]] movement, bi-directional [[central rotor]] winding
  * [[Escapement]] Stone lever
  * [[Yoke winding system]]
  * [[Column wheel]] calibre
  * 328 components

**Functions:**
  * [[Chronograph]] 60 seconds, 30 minutes, 12 hours
  * [[Small seconds]]
  * [[Quickset]] date at 6 00

**Data:**
  * 13¼ [[ligne]]s
  * D 30.0 mm, H 6.5 mm
  * 17/31 [[jewels]]
  * 36,000 A/h
  * Power reserve 50 hours

**Production period:**
  * -present
</WRAP>

{{tag>Movements Automatic_movements Chronograph_movements Automatic_chronograph_movements Column_wheel_chronograph_movements Zenith_calibres Zenith_El_Primero_calibres}}