Broken window coil spring and lock

Thanks for posting. From what I can see in the photos, it looks like you might have our 15-087 coil housing pivot. To confirm that this is the right replacement, you'll need to remove your existing hardware from the window and compare the dimensions.

Detail of 15-087

This housing pivot is compatible with the Series 180 Coil Balance Springs. To confirm which spring you'll need for your window, check the metal coil for any stamps/markings. You may also need the 16-024 mounting bracket.