Definitely graphite, and looks to me like an offshore build, very similar to a couple of Taiwanese rods built on IM6 blanks I had many years ago built on IM6 blanks. Probably a good fisher with minimal value.
Shrimpy

rvreclus has the shop and owner right. Doug Matteo, the owner, had rods finished on various blanks, including some very good ones. The guy who did many of them was Ed Miller, and this rod looks like it could be his work, which was quite good.

Sandman, what about the rod assures you it is glass? Labeling? butt diameter and overall dimensions of the blank? I hoped we'd get great info from our west coast members, and sure enough. Possibly the approximate dates of that business will rule this out, but 9' for 6 line was an uncommon configuration for 'glass at the approximate time that seems likely, and 9' for 6 line was a common configuration if the shop was operating early in the fly-fishing boom of the 1970s and the onset of the graphite era. As others have observed, if it is black and feels like graphite, it probably walks and talks like a duck. It could still be an excellent rod, just not fiberglass.