Eterna Demonstrator?

Discussion in 'Wrist Watches' started by Dave Coatsworth, Jul 1, 2018.

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  1. Dave Coatsworth

    Dave Coatsworth Forums Administrator
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    Feb 11, 2005
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    I picked up what I assume is some sort of store demonstrator for Eterna. But, what is it supposed to demonstrate?

    EternaDemonstrator.jpg
     
  2. dAz57

    dAz57 Registered User

    Dec 7, 2011
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    Compensated tuning fork?
     
  3. Adam Harris

    Adam Harris Registered User
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    My guess quartz, oscillation or battery strength
    Pyre guesses
     
  4. Chris Radek

    Chris Radek Registered User
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    The Eterna Sonic used the ESA9162 movement, which has a tuning fork shaped a lot like that demonstrator, with weights above and below the foot. This fork shape is superior to the Accutron's because it eliminates the inherent positional dependence (difference between tines-up and tines-down rates, which on an Accutron is about ±4.5s/d)

    I imagine this is to demonstrate that difference to a customer, but I wonder how exactly...
     
  5. Jeff Hess

    Jeff Hess Moderator
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    Awesome! thanks! I have always loved the old Eterna's marketing. They also made some cool pocket demonstrators of see-through working movements!
     
  6. Dave Coatsworth

    Dave Coatsworth Forums Administrator
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    Thanks, Chris!
     
  7. RL

    RL Registered User
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    I have seen a few of the Eterna tuning fork watches. They were really nice looking and well made.
    Havn't seen one lately.
     

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