Zenith 405

Calibre 405 (and updated 405B) is an automatic flyback chronograph movement from Zenith. Released in the 1990's, this was one of the first modifications to the classic El Primero movement.

As the El Primero renaissance continued in the 1990's, Zenith made the first major complication addition with the introduction of the flyback-equipped Cal. 405.

Because of the unconventional 4 30 date window placement in the classic El Primero movement, Zenith created a new calibre, Cal. 405B, which moved the date to the 6 00 position.

• Zenith 400B - The base movement
• Zenith 4001, Zenith 4003, Zenith 4009 - Other flyback El Primero movements
• Zenith El Primero
• Zenith El Primero calibres
• Zenith El Primero watches