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I can't say I've heard of a Star brand fly rod before. If the rod is black, are you sure it is glass? Black was not a common fly rod color until graphite came out. Harnell was one of the few that sold black glass rods before the mid-70s.
Tell the pawn shop because it is glass the rod must be at least 60 years old and they should pay you to take it. Yeah, I'm kidding. But $100 for an unknown glass rod is too much.
If you use the forum search function, most hits for 'star' will refer to Garcia Conolon "star" rods, meaning their good, better, best grades. The rods were marked with stars on the rod label, 5-star being the highest grade.