26 4 B.S.I. RL

Hello,

Thanks for writing in! I'm afraid I cannot identify your window balances from the photos provided. The stamp helps us to determine the weight range the balances should be able to support but we cannot use it to determine the series you need. Please provide clear photos of the top and bottom attachments on the balances.

Since the window balance is jammed in the window jamb, you'll likely need to replace the top sash guide(s) as well. To confirm the right replacement for these, I'll need to see a front profile view of an undamaged guide.

Take a look over the tutorials, tagged below this thread, for instructions on removing/installing the balances and top sash guides.