It was late at night when I thought this one up. Little did I realize I had read Mark's book and remebred reading about most of these manufactures. I'm not eaxtly sure why I wrote this one when the answer was sitting next to me. Actually I have the Frist and second edditons of Vintage Synhtesizers. Also I subscribe to KEYBOARD magazine to see Mark's latest vintage synth review.
Next time I will ask a question that I don't already know the answer too. Sorry about all this.