how my screen stay on my windows

A home owner from bellingham, ma says:
looking for this piece that holds the screen on the window frame. I believe they are Harvey windows crank style approx 20 years old
Thumbnail of the uploaded file named screen.jpg
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Lauren from SWISCO responded:

Hello, thank you for posting,

Please start by reviewing the style of the 70-050 or 70-050B spring clips. Compare the dimensions of each to confirm the best fit. Let us know what you think and if you have any additional questions! 

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