Sash weight identify

A quick learner from Southampton ny says:
July 30, 2017
The window is around circa 1965 and there aren't many markings on it. It does say Anderson corp. bayport minn. and a stamp on it " A 3 19 7"
Sash weight identify
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Tom from SWISCO responded:
August 2, 2017
Welcome to SWISCO. There may not be many markings, but there is one that matters. Our 24-331 Andersen balance will replace balances marked "3 19".
Andersen Sash Balance, 319, 325, 331
Andersen Sash Balance, 319, 325, 331
24-331
$54.20
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