The thread on six string banjo reminded me that many years ago (late seventies or early eighties ) I took guitar lessons from a man who was supposed to teach me to read music properly. He was 'renowned' in the region as a great teacher, and the person to go to if one wanted to graduate from having a good ear to pick up tunes, to actually understanding and reading music. Never happened btw. He was content to let me play my 6 string, but he played a 7 string guitar (not sure I should name names,but he lived in the vicinity of the Apple).

Anyone ever seen one of these things? I am curious if they are still being used, and if there are any established players who play them and for what kind of music.
I think this teacher favored jazz and classical music.
thanx