Thank you for the pictures of your two periscopes Mervyn, the top one with the wooden handle, i have one....but the eyepiece lens is very rough, and could do with replacing.
Your second one looks very interesting....but difficult to see what is happening within.... Has it got mirrors or prisms....does it have magnification of the image?...
I think i'll include some more pictures of my other periscopes....This one is a French made (HUET-Paris), for the German Army WW2... It works beautifully and is cased.The top and bottom sections expand, and give additional height.The top section can be revolved from holding position, giving 360' Visibility..Some of these models have a wooden handle, but this one is designed for use with a metal spike....Thanks again for your pictures , more detail of the second one would be greatly appreciated...Ian