Zenith supported (and continues to support) the A386 by providing service dials and hands as needed. – No more than 2,000 Zenith A386s per Hodinkee (2012). This figure was determined by Zenith in 2007. – 2,500 in Rossler’s Zenith: Swiss Watch Manufacture Since 1865, published in 2009. Zenith will not be publishing any updated values. This update of 4,500 pieces is based upon additional Zenith review of the archives, and is the last official value from Zenith, provided to Rossler in 2014. Production is estimated to have been between 19, with dates based on serial numbers plus information from the Extracts from the Zenith Registers, and combined with information from original owners.
Per Manfred Rossler in the catalog El Primero – The Chronograph (available in German only) from 2015, there were approximately 4,500 Zenith A386 produced. For details on the race to build the first automatic chronograph, read about Project 99 at OnTheDash. The Zenith A386, announced in January 1969, introduced the El Primero movement, the first automatic chronograph in production with an incorporated automatic chronograph movement.
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