Storm window and screen parts

A home owner from 22192 says:
Windows are from the 1970's.
Tripple track, two storm glass and one for the screen
What is the method to remove the spring without having to pry the track open? I don't see a hole to depress and the track looks like a machine "pinched" the area to hold the spring clip
User submitted photos of storm window hardware.
Profile picture of Paul
Paul from SWISCO responded:
When you remove the latch by sliding from the frame, the spring should follow. The notch for the spring is a stop.

As for possible replacements, the finger latches looks like our metal 91-010 and 91-011. Check them out and see if you agree. The spring looks like our 91-102 and for The top tilt, which I believe is handed right and left, might be our metal 95-008 and 95-009. The plain bottom corner key looks like our 95-016. Just carefully compare the dimensions of these suggestions to your own hardware and see how they match.
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