ok, trying to figure out these two items..

first is a part of a tank I am told. It APPEARS to be possible a driver view port, or something similar. Is it indeed a tank part, if so, from what tank?

second item is a brass tube piece that was supposidly used for shipboard communications within the ship. Any idea what kind of vessel it came from, or if it really is what I am told it is?

What is the value of each item?

thanks guys. its appreciated.