Need help with Anderson window part 139 5 23 1269

A quick learner from Wilkes-Barre says:
I have an Anderson double hung window that the draw strings have broken I took the window apart and removed the balance boxes the numbers on the box don't match any numbers on your web site, my balance box numbers are 139 5 23 1269 the glass size per pane is 16" x 23-3/8" they are both the same size looking through the window the glass it self appears to be 1/4" thick so it's either a thick single pane or two thin insulated panes.
Thanks for any help,
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting! Please take a look at our 24-531 Andersen Sash Balance, which can replace sash boxes with the stamp 5 23.
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)
Current wait time is 4-7 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at 856-317-6263 or at