English: Picture closeup of Casio CFX-400 watch manufactured circa 1985. Highly unusual for a calculator watch, this model was a scientific calculator, having functions such as square root, trigonometric functions as sinus, exponential functions, logarithms to basis e or 10, etc.
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2008-07-14 03:50 Septagram 615×724× (72139 bytes) Picture closeup of Casio CFX-400 watch manufactured circa 1985
Captions
Watch picture seems to be a 2,000 or later year model. Early versions were square.
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