Rare Casio CFX-200 Scientific Calculator Watch (1983)

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Casio CFX-200 Scientific Calculator Watch (1983)

  • Why it’s rare: The only wristwatch that could perform scientific calculator functions (trig, log, etc.).
  • Production: Short-lived, since it was too expensive for most users.
  • Collectibility: Extremely desirable among Casio collectors, especially NOS (new old stock).

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