This is a plain channel balance, 26" in length, and has stamping of 26H B.S.I on the outside channel.
Currently the balancers have a clip connection at the top of the window, but there is also a provision for screw in mounting in the frame.
I am looking to replace 6 channel balancers, and will need mounting screw way w/screws or clips as well.
I appreciate your assistance, and look forward to hearing from you soon