Window coil broken

A home owner from Redondo Beach, CA says:
July 26, 2019
I had purchased what I thought was the correct part to replace my broken window coil balance.
I hope that the pictures show the part that I need. The number 10 appears on the plastic housing.
There are 2 coils inside of the housing.
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Casey from SWISCO responded:
July 31, 2019

Hmm, it looks like the S140-10 to me too. Could you go into some detail about why it didn't work for you?
A home owner from Redondo Beach, CA says:
July 31, 2019
The coil broke. I thought that it was an S140 but it's different. The S140 has one coil in the housing case but I think that what I have in my window has 2 coils within the plastic housing.

The first photo below shows an S140-10 next to the housing of the broken piece. They appear to be different. The second photo shows a functioning unit identical to the broken unit that I'm looking to identify.

Thanks so much for your effort to help me identify the correct part that I need.

Dan Greller
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Tom from SWISCO responded:
August 1, 2019

The number of coils shouldn't matter too much as long as they carry the same amount of weight. Your old stamp indicates that yours carries 10 pounds per side, for sashes weighing 19 through 20.99 pounds. This is the same as our S140-10. The number of springs doesn't matter beyond that. You could have 1 spring per side or 100, as long as they carry the same amount of weight in total then they'll counterbalance the sash. 

What's the exact weight of your sash? It's possible your sash weight falls outside those limits.
10 lb Series 140 Quick-Tilt, Single
10 lb Series 140 Quick-Tilt, Single
S140-10
$9.85
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