balancer replacement part number??

A quick learner from North Andover, Massachusetts says:
September 18, 2019
Need to figure out what the replacement balancer is for this older balancer. Window is a double hung , inner glass approx. dims are High 21 7/8. 28.5 wide
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Bob from SWISCO responded:
September 23, 2019

Thanks for posting. See our 24-837. This Andersen Sash Balance can replace old balances that include the stamp code 837. Let me know if you have any other questions.
Andersen Sash Balance, 823, 827, 831, 837
Andersen Sash Balance, 823, 827, 831, 837
24-837
$54.20
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