Block and tackle balance 2930E label

Hello,

Your balance reminds me of the S380-30 or S385-30 at first glance but the bottom fitting is too damaged to confirm the correct replacement. You’ll need to remove an undamaged balance from one of your windows to compare to the depth measurements shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment. 

You'll also need 2930 spring strength options for your replacement balances. Thank you and let us know if you have any other questions or concerns.

Comparison of the S378, S380 and S385 balance shoes.