broken coil balance

A quick learner from Iowa says:
March 10, 2021
I have a broken coil balance to replace off an MI #1555 window, left side. Inside the cover is stamped 8, spring is stamped 732. Width is 1 1/4, depth is 9/16 & distance between the 2 mounting screws is 1 1/4. I will replace both sides if you have a part that fits.
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Bob from SWISCO responded:
March 11, 2021

See our 15-180 Pivot Shoe, which uses Series 190 Coil Balances. The stamps on the springs themselves are what relevant. A coil spring stamped 740 means you should use the S190-740 7 pound spring. Let me know if you have any further questions. 
A quick learner from Iowa says:
March 11, 2021
Thanks, 15-180 ordered.
Coil Balance Shoe
Coil Balance Shoe
15-180
$3.97
740 S190 Coil Balance Spring
740 S190 Coil Balance Spring
S190-740
$9.74
Double Support Detent Clip
Double Support Detent Clip
15-181
$6.17
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