Need identify for replacement
These storm window latches aren't made anymore, and finding exact replacements can be difficult to accomplish. These look similar to our 91-128 and 91-129, but also our 91-158 and 91--159. Carefully go over all the dimensions listed on each shop page to see if either set matches what you need.
As far as the frame falling apart goes, you may need to replace the corner keys. We can help with this as well, though we will need the thickness of the screen, as well as the thickness and width of the legs of the corner key. A picture of it out of the screen would also be useful.
As stated above, we'll need to see the corner key out of the frame. We need to know the thickness of the screen, as well as the thickness and width of the legs. In the time being, you can view our wide array of corner keys here.