Need help with Anderson window part 139 5 23 1269

A quick learner from Wilkes-Barre says:
April 16, 2012
Hello,
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,
Greg
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Paul from SWISCO responded:
April 16, 2012
Thanks for posting! Please take a look at our 24-531 Andersen Sash Balance, which can replace sash boxes with the stamp 5 23.
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