Apollo Window w/ broken spring

It's hard to make out what you have based on these pictures, but I think I spy the 16-024 mounting bracket in your second photo. This is compatible with the 15-087 pivot housing and Series 180 coil spring. Could these be all you need? Look them over and let me know what you think. Keep in mind that you will need the stamp printed on the old spring to confirm the best Series 180 option.