Capitol 3500 coil balance needed

I'm afraid I'm not familiar with what balances that window used. Can you show me a photo of the pivot shoe to which your springs attach? that will allow us to identify everything else you need. Seeing the pivot shoe is a crucial detail. Because of this, I would like you to fully remove it from the window before you take your picture. That way we will be able to see it as clearly as possible without obstruction.