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![Zenith Chrono cal. 146DP ref. A278 Zenith Chrono cal. 146DP ref. A278](http://timeline.watch/wp-content/uploads/2015/09/P1200493.jpg)
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![1968 Zenith Chrono cal. 146DP ref. A278 1968 Zenith Chrono cal. 146DP ref. A278](http://timeline.watch/wp-content/uploads/2015/09/Web_11.jpg)
1968
Zenith Chronograph Tachymeter
North Vietnamese launch the Tet Offensive, a turning point in the Vietnam War1968 Zenith Chrono cal. 146DP ref. A278, 37mm. case.
The 146 is the last manual wind chronograph movement used prior to the introduction of the el Primero automatic.
Zenith is a luxury Swiss watch manufacture started in 1865 by Georges Favre-Jacot at the age of 22. Zenith was purchased by LVMH in November 1999, becoming one of several brands in their watch and jewellery division.
Zenith has a long reputation for the quality and precision of their watches. It is one of the few Swiss watch manufacturers that still produce their own movements in-house, including the Zenith el Primero one of the first automatic chronograph movements from 1969.