Casey from SWISCO responded:
August 15, 2023
Hello, I agree that your combination of attachments indicates that you could have either the S380-30 or S385-30 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment. You'll also need 2630 spring strength options for your smaller window and 2950 for the larger window balances.
As for your top sash guide, take a look at the 18-161 shown below. Thank you and let us know if you have any other questions or concerns.
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