Bottom window lock mechanism and upper double spring

A handy person from Grove City, OH says:
September 8, 2019
Bottom window lock measures 1.25" wide and 1.5" tall. Depth of the channel is 5/8". The coil is 1/4" wide.
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Bob from SWISCO responded:
September 12, 2019

Thanks for writing in. This pivot shoe looks like our 15-177. This shoe is compatible with our Series 152 Coil Springs. Let us know if you have any other questions.
A handy person from Grove City, OH says:
September 13, 2019
Thanks for the response. Are there any other measurements I can give to help. The house was built in 2007 so fairly newer style windows. Was hoping to find replacements for a couple of windows.
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Bob from SWISCO responded:
September 13, 2019

If you need any further help with replacement coil springs, the first step to do would be to remove them from the window. Next, look for some sort of stamping/marking on the spring. If there aren't any stampings/markings, please get back to us with the exact weight of your sash. From there, we should be able to give you more information. 
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