storm windows 1960?

Thanks for contacting us! I'm afraid we don't sell this slide bolt. You're welcome to browse our selection here to see if you think you could adapt one but they're a dying breed, unfortunately. 

I don't see the splines in these photos. The 59-067 and 59-068 are commonly seen on windows like this though it is far from a guarantee. 

As for the corner, we would need to see it removed from the frame. It'd also be helpful to know the thickness of the screen frame as well as the precise thickness and width of each leg. I should mention that there's a chance we can't help with the corner even after removal but we'll try our best.