Hello,
We'd be happy to help but we'll need to see a photos showing the connecting point between the balance and pulley, which is only partially visible in your photos. That will help us confirm if one of our stock balances could work or if they'll need to be custom-ordered. Thank you!
Thanks for getting back to us. As long as your bottom fitting measures exactly 1-3/32" deep, you would need the S385-22 channel balances for your window. You'll also need 2140 strength options based on your balance stamp. Take a look and let us know if you need anything else.
