34" caldwell series 300 5/8" Channel Block & Tackle window balance

A quick learner from Newport Beach says:
Caldwell 300 series 1 1/4" Top Guide winged
Caldwell series 300 winged 1 3/32 bottom
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Jasmine from SWISCO responded:

Thanks for reaching out! Your channel balances looks like it could be our S385-34. The winged bottom attachment has a depth measurement of 1-3/32", like yours.

You'll need to select the 3330 stamp option.

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.

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