identifying the correct balancer.

A quick learner from cincinnati, ohio says:
How do you identify the model of the Andersen window so you can order the correct new balancer without disassembling the window first?

There is only one cord on each side for the lower window.

Thank you in advance for your help
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Tom from SWISCO responded:
I'm afraid there's no reliable way to identify the balance. If you were to give me the Height" x Width" of the visible glass, we can make a recommendation, but there will be no guarantee that it's a match.
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