Andersen Balance E29 9P27 1075

A quick learner says:
These were installed 1976, I see a lot of balances but don't look exactly what I have. I hope the pictures below help.

Thank u John
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Good morning, John. Check out our 24-939. This can replace Andersen balance boxes with a stamp of 9P27.
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