Identify Channel Balance Without Brand

A handy person from Petaluma Ca. says:
May 7, 2018
This is from a @45 s 35 non tilt double pain window.
The metal channel measures 31 7/8" and is 1/2" inch wide.
There are faded markings and the best I can read of them is "315" and I believe it to read Caldwell.
I need two for this window, I believe the window to weigh 25-30 pounds or so.
Thanks for the help
Thumbnail of the uploaded file named IMG_3567-Edit.jpg
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Tom from SWISCO responded:
May 8, 2018

Just by sight, that looks like S385-32. See if your bottom shoe matches this one below. If so, you need Series 385. The S385-32 comes in a "3150" option, very similar to "315." "3150" holds a 28 to 32 pound window sash, which overlaps with the weight range you listed. Weigh more closely to be sure, and of course, don't forget to measure your shoe, as I mentioned.

Alternate view of 15-004
Alternate view of 15-004
A quick learner from Petaluma says:
May 8, 2018
Ben, Perfect match. Thanks so much for your help. Will have them order today.
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Tom from SWISCO responded:
May 8, 2018

Awesome! Thanks for confirming. I'm so glad the part seems to be a match!
32" Series 385 Channel Balance
32" Series 385 Channel Balance
S385-32
$11.52
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