Identifying old folding knives

[bryan11]

I found a box with around a dozen old, folding knives from my grandfather and would like to learn more about them. Could someone give me some tips as to where to start?

thanks,
Bryan

 

[Brutus013]

Post some pics! It'll be much easier to help if we can see them.

 

[lambertiana]

More specifically, post quality pictures in Bernard Levine's subforum. No flash, straight on against a light gray background. Close up - open, closed, and closeups of the tang stamps.