Don't know if this was for signals or telegraph or both. There a small number of poles, to the east along the same line which still have glass on them, but it's all clear. I chose this pole cause not only is there Aqua, but there's also some variety. I see a couple CD 145's and CD 152's, in addition to the CD 154's and 155's. As late as 2009, which is when I started looking up, there were still a great deal of poles such as this one along Broadway in Alton, IL, but they've been drastically reduced by recent improvements along the road.