Series 152 Coil Balance Quote
Hey there,
Your balance shoe seems to be an exact match for the 15-177 Coil Balance Shoe. The pivot bar reminds me of the 26-030.
These pivot shoes are compatible with our Series 152 Coil Balance. They are attached to the shoe using the 33-072 screw. Given the sash weight, you'll need the S152-7 and S152-8 to replace the coils.
If you need replacements for the coils supports, the 15-143 Coil Bushing, 15-144 Coil Bushing Cap, and 15-145 Coil Support Barrel are used to replace them. All three snap together to complete the supports.
The latches remind me of the 26-243A and 26-244A.
Carefully compare the dimensions for each of the recommended parts, on the website, to confirm that they are the replacements you'll need.