1984 according to various online sources like https://blog.adafruit.com/2012/05/25/casio-at-550-touch-screen-calculator-watch-1984/ … . Still impressive though!
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Thanks for posting. The first prototype was actually 1981. It was fist sold in limited supply in Japan in late 1982-1983. World wide was 1984.
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The calendar ran out this year 2019. So I need a new watch.
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Brian did you ever experience IBM/BellSouth’s Simon? A great device ahead of its time. We couldn’t give them away. https://en.m.wikipedia.org/wiki/IBM_Simon
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Remember seeing
@wasbuxton demoing this. Pretty neat.Thanks. Twitter will use this to make your timeline better. UndoUndo
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