Why does new 1969 revival use 400 instead of 400Z?
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Thread: Why does new 1969 revival use 400 instead of 400Z?

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  1. #1
    Member
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    Jun 2019
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    Why does new 1969 revival use 400 instead of 400Z?

    If the El Primero 400Z is an improved version of caliber 400, why is the 400Z not used in the new 1969 revival?

  2. #2
    Zenith Forum Co-moderator
    Join Date
    Feb 2006
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    Re: Why does new 1969 revival use 400 instead of 400Z?

    I don't know - but I suspect that it probably is used after all.

    The 400Z differs from the 400 insofar that the escapement gear has one more or less tooth (I can't remember offhand which it is - I think it's less rather than more: 20 vs. 21) and that the lever is shaped accordingly. The redesignation came so that in watches of certain lines in production around that time, it was evident which version of the movement was inside so in case replacement parts were required, it was obvious which ones they would be. Meanwhile, all these lines have disappeared and new ones have appeared and all these will have Cal. 400Zs inside. Since the exact movement is obvious for these, I suspect that Zenith no longer stamp the movements accordingly. However, this is suspicion and would require independent confirmation.

    Hartmut Richter
    moyrules likes this.

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