Paul from SWISCO responded:
June 1, 2015
I agree, I have never seen a wood Andersen single hung window. Are you sure it's Andersen? If you can, please send some photos of the window and balance so that we can help you. You may need to remove the balance from the window so that we can get a good look at it.
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Tom from SWISCO responded:
June 10, 2015
Thanks! This looks like a pretty standard Andersen balance to me. Based on your stamp, I would recommend our 24-837. This can replace all Andersen balance boxes stamped with 8#31.
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