Sash Support Andersen Window Balance
A home owner from PA says:
August 10, 2013
Please, could you help me to identify Sash Support Andersen Window Balance - c39 6#23 3-78 - these are the only markings I found on the sash box. House built in 1978.
Tom from SWISCO responded:
August 12, 2013
I think you should check out our 24-637. This can replace balance boxes with the stamp 6#23.