Andersen Window balance

A quick learner from Pennsylvania says:
June 19, 2019
Both left and right balances are stamped exactly the same. What replacement balances do I need?
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Tom from SWISCO responded:
June 24, 2019

Based on your old stamp of "12#27," I recommend our 24-1231. This is designed to replace any Andersen balance with that marking.
Andersen Sash Balance, 1226, 1227, 1231
Andersen Sash Balance, 1226, 1227, 1231
24-1231
$54.20
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