Andersen Window Balance Model

A handy person from Haddonfield, NJ says:
The balance appears to be stamped with the following:

E7 9P 27 873

The dimensions are 6.25" x 2.75" x 0.75"
User submitted a photo of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Based on your stamp of "9P27," I would recommend our 24-939.
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