An approximate table of Zenith movement serial numbers and their corresponding years of manufacture.

It is not always possible to determine the exact date on which a watch was produced, as the movement stocks could often lie in storage for several years before being fitted into the case (in practice there was a difference of 20 years).

Below are two versions of the serial number tables. They are more or less identical, with a deviation of plus or minus 3-4 years.

The serial number is located on the movement of each watch.

Table 1:

Table 2:

Some Zenith watches/chronographs by year of manufacture:

1925 pusher chronograph with internal telemeter scale

1960 Chronometer "Cal. 135" with indirect second

1965 Chronograph with 30 minutes and 12 hours counter, 3 sub-dials

1969 Chronograph "El Primero"

1969/2013 Chronograph El Primero 36,000 VPH

2008 Defy Xtreme Chronograph

2008 Defy Xtreme Tourbillon Zero-G - gimbal-mounted tourbillon cage

2013 Captain Windsor caliber 4054

2013 Heritage Ultra Thin Caliber 681 Elite, 3.5mm height

2014 Pilot Doublematic, alarm function, world time synchronization via crown

2014 Captain Power Reserve, power reserve of 50 hours

2014 El Primero Chronomaster "Tribute to Charles Vermot", partially open dial

2014 El Primero Lightweight - composite aluminum / titanium case

Source: Herbert James "The Most Successful Wristwatches"