I don't know the brand but I bought them from Anderson Archery back in the 1960's. A single and a six fletcher. Both helical and straight clamps, inserts for 3 @ 120, 4 @ 90, 4 @ 75x105, and 6 @ 60. They have fletched several hundred arrows over the years with no problems.
I don't think the current Anderson Archery is the same one I purchased from years ago.
I don't think the current Anderson Archery is the same one I purchased from years ago.