Comfort World Window broken coil spring

A quick learner from Idaho says:
September 8, 2018

Good Afternoon.

I got called in to fix a Comfort World vinyl window. The steel spring on one side was broken and mangled. The serial number on the window is longer legible. Looks like S152 coil. But I don't see a stamp on the coil. What more info do you need? Weight of window? Height of window?

The sash weighs 13 pounds.

Found the stamp on the broken coil. It says 6K.

Spring confirmed to 1/2" wide.

Thanks, Dave

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Tom from SWISCO responded:
September 11, 2018

Thanks for posting. I agree, the Series 152 looks like a good match. Your shoe looks like our 15-177, which is made to work with exactly that spring. Based on your stamp, I recommend the S152-6.
A quick learner from Idaho says:
September 11, 2018
thank you.
Dave
Coil Balance Shoe, Slate Blue
Coil Balance Shoe, Slate Blue
15-177
$3.47
6 lb Series 152 Coil Balance
6 lb Series 152 Coil Balance
S152-6
$4.80
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