Thank you for the comments.
Though this thread is fairly old, my signal collection has changed quite a bit. A majority of the signals that are shown in the pictures above are no longer in my possession, since I had to sell most of them for a couple of personal reasons. Another reason is that, since I sold most of my signals, I decided to begin to collect signals that solely saw service in the city of New York. I originally lived there for most of my life, so I have always been fascinated by the signals and equipment that were in use.
I made this decision a couple of months ago, and, since then, I have obtained some interesting pieces. I'll post some pictures of what I currently have sooner or later.