Peachtree Balance Identification

A handy person from Endicott, NY says:
May 20, 2021
Need to replace balances on lower sash of Peachtree D4266 cottage window. Original balance bears designation as indicated in attached photo. Does this provide enough to know whether I need your part number 60P-315, 60P-316 or 60P-319?
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Bob from SWISCO responded:
May 24, 2021

That stamp just tells us the strength of the balance. Can you show us the attachments at either end? And can you confirm the length of the metal channel? From there we'll do our best to help. 
A handy person from Endicott, NY says:
May 24, 2021
Thanks for getting back to me. The balance is 32.25" tip to tip, and I have attached photos of each end.

From your selection tool, I had gleaned that the correct part is Product Code 745-32, but didn't know what spring strength was indicated by the stamped number.
Thumbnail of the uploaded file named Balance end 1.jpeg
Thumbnail of the uploaded file named Balance end 2.jpeg
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Bob from SWISCO responded:
May 25, 2021

So long as this balance uses the 16-027 Terminal Plug at the bottom, which I don't see in these photos, then yes, the Peachtree S745-32 makes sense. Now, your stamp code is a bit unusual, but we see odd ones from time to time with these balances. Weigh the window sash that uses these balances. You can then match that exact weight with one of the weight ranges listed alongside each stamp option on the balance's shop page. 
32-1/4" Peachtree Balance
32-1/4" Peachtree Balance
S745-32
$19.54
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