The spiral balance appears to be standard and 15 inches in length.
I'm having trouble determing the proper pivot lock shoe. The ones currently in the windows are 2 1/8 h x 1 1/2 w and the depth appears to 9/16. The photo of the broken pivot shoe shows it was slightly curved so it may not have been the precise size. The pivot shoe also has a channel to navigate the window bar (?) through. I couldn't find a similar pivot shoe with this channel for a spiral balance, so I really need your expertise on this.
I don't really know the function of the rectangular tabs on the window. The tabs are 3/8 w x 1 1/8 h and the openings are 3/16 x 1. The window latch is 3 1/8 w x 1 3/8 x 3/8 d.
Thank you for your help in identifying these parts.


