I think that South Bend made bamboo fly rods years ago, but the plastic wrapped grip seems odd.
There are a lot of low-grade post-WW2 Japanese bamboo fly and spinning rods out there waiting to catch somebody who thinks that he is getting Orvis quality for 1/10th the price. Your rods "sound" better, but no markings would be a concern. That said, if they work for the intended purpose, I say go4it!
1 of my good friends from high school is 1 of the best, or luckiest, trout and smallmouth fisherman who I know. He uses an old "Butterfly" brand Japanese bamboo rod and regularly catches the biggest brook, brown, and rainbow trout that live where he is fishing. About 8 years ago, I saw him catch land-locked salmon or brook trout on the Rapid River in western ME on nearly every cast with a #12 Adams dry. A crappy rod and a generic fly, I guess that presentation really is everything.
Jeff
