This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Panel CGO Line and CutOff Relays. This is an example of group of relays for Ground CutOff Panel Line Finder frames These particular relays with the cover removed only support five line circuits The items in this photo look old Consider this photo was taken in the early 's and the relays were over years old then own assumed Panel