Two wire service brackets were scattered around town for openwire 120 volt service drops from the early teens to around 1930. These were galvanized steel and each of the pins had a wood cob. One is on the lower crossarm on the left. I have not seen this type of bracket anywhere else. They are unmarked and I do not know who made them. A photo of one from my collection will follow in the near future. This is a pole closeup of the one on the right in the previous photograph (click "Previous").