SWISCO - The Replacement Hardware Authority

Two Andersen balances

A quick learner from alexandria,va says:
I have the following Anderson window balancers part numbers. Please email the appropriate replacement SWIS bancroft part numbers.
Charlie
1) R21 931 8-88
2) D789# 31487
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Paul from SWISCO responded:
Hello, Charlie. Based on the stamps for each balance, I recommend our 24-939 on both.
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