Rivco channel balance parts/installation advice needed

A quick learner from Southern NH says:
March 20, 2016
I have Rivco tilt windows from the late 70s.
I need to replace something that looks like a 24
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
March 22, 2016
I see you were looking at our Series 751 channel balance. This looks like it's a good match. How well does the information shown on the S751-24 store page match up to your o wn? It looks like yours may also install with a hook like our 19-029 or 19-030.
Long S-Clip
Long S-Clip
19-030
$0.70
Short S-Clip
Short S-Clip
19-029
$0.65
25" Series 751 Channel Balance
25" Series 751 Channel Balance
S751-25
$11.25
How to install a ribbed tilt channel balance with knife lock shoe
How to install a ribbed tilt channel balance with knife lock shoe
VIDEO
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Classifying Channel Balance Fittings
Classifying Channel Balance Fittings
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