Constant Force Balance System Replacement

My constant force balance system recently broke for one of my windows.

I added pictures above. I believe the replacement for this is the Series 140 Quick Tilt, Dual Replacement; however, I wanted to make sure I select the appropriate replacement. I checked the coils for the stamps and noticed that the top coil is stamped as a 9 and the bottom coil is stamped as a 7. I included pictures, but they may be difficult to see. In this case, would I select stamp 16?

Also, can you confirm that I identified the appropriate part?

Thanks,

Charles