Need Replacement spring. Having trouble identifying part.

A handy person from Irvine California says:
This window spring is 1/2" wide by 23 3/4" in length. It doesn't have any shoes or plastic parts on the end. It was mounted at the top of my window and it has a metal bracket (that broke) that screws into the side of the moving window. The only marking is 163 shown in one of the photos. I do not know the window manufacturer. The approximate age of the window is 40 years.
Thumbnail of the uploaded file named IMG_5091.JPG
Thumbnail of the uploaded file named IMG_5092.JPG
Thumbnail of the uploaded file named IMG_5093.JPG
Profile picture of Tom
Tom from SWISCO responded:

We may be able to supply a replacement for this balance, but it will have to be a special order due to its configuration. Before I recommend anything, can you just confirm the length of the metal channel? Can you also tell me how many you need?

Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)