Dear Swisco,
I believe ours is a crossbow balance.
I list the component for one of the windows.
The windows are made by
N.W. Patriot Manufacturing., Inc.
These are measurements of the balance as well as pictures
Lower sash wt = 14 lb
Width of T-shaped shoe = 1 in
Fiberglass rod = 25 1/4 in
Coiled spring = 13 1/2 in
Kindly let us know if this is 850 Crossbow balance ? If not, what kind of window is this and if you sell any replacement parts?
Looking forward to hear from you
Thank you
Sincerely,
Gloria