channel balance

A home owner from West Palm Beach says:
Non-tilt window
only markings on the channel balance are 2320
width 1/2"
approx 25" long
Home was built in 1981
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Paul from SWISCO responded:

Based on what I am seeing in your photos, it looks like you may have Pan Am windows that have used our S377-24 channel balance as a replacement. Take a look and let us know if you agree. If so, then you can go with the 2320 option that holds a sash weight of 9-15 pounds. 

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