Hello pianokeyjoe,
Excellent info… Thank YOU so much!!!
it is really very interesting. The CT-620 appears for the 1st time in a Casio catalogue in 1985 [listed as «New»], and as far as I know, both the CT-605 and the CT-606 are earlier models…
So…, is it possible to know when did Casio stop production of the CT-620, and how many units were produced?
I tried to ask Casio about this question with no success so far…
Again, thank you very much and all the best from Galicia [North Western corner of Spain, at the very end of Europe, aka, Finis Terrae]