Help me identify my channel balance

A quick learner from Campbell, CA says:
Can you identify my channel balance from the attached images? I do not see any stamp on it aside from the printed "32 4 HP CALDWELL" on it.

Thank you
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Based on your pictures and information, I recommend our S385-33 channel balance with a 3240 option. See what you think.
A quick learner from Campbell, CA says:
Seems right. I ordered it.
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