Single coil, coil stamped 9

Thanks for reaching out! We don't have an exact match for the balances you have pictured here, however, I believe our Series 140 Coil Balances are worth considering. 

To confirm the correct spring strength for your window, you'll need to look for any stamps or markings on the coils you removed from the window. It may also be easier to obtain the window weight and divide it by the number of coils in the window. 

Take a look at this coil balance assembly and see what you think.