Interesting reading, especially as I didn't realise how far ahead of the times they were. The other thing that strikes me is that they'd churn out all sorts of watches - from incredibly beautiful things, to absolutely hideous (from a modern perspective) with bold colours on plastic, but some new geeky features. Also, I'd never thought about how many Casio watches I'd owned in my life!
When I was young I had the calculator watch. I guess C-80, as I remember the white buttons sticking out, but I can't remember any other features. Also not sure why I had a calculator watch I must only have been about 6 or 7 years old. Maybe I'd convinced my parents it was cool!
I also had a 50m water resistant watch, which isn't in the article, but looks like it was the W-59. This was black plastic.
I must have had another watch around this time too, as I remember having a skin reaction (eczema) to the metal back, and having to wear a cotton layer between the watch and my skin. It couldn't have been the next watch though, as the article says it was introduced in 1995 and the eczema would have been around 1986.
The AQ-230 was the last watch I wore before going watchless for about 20 years.
In the early 2000s the strap on my AQ-230 broke, and I realised that I now always had a mobile phone with the time and no longer needed a watch. I didn't get another watch until my first Garmin for running / hiking, but that was only worn during activities, and my most recent Garmin that I tend to wear most of the time.