Dwarf stack at CP-98 on the CSX Boston Line with 'C' signal for CabSignal without wayside signal operation. When the light under the letter "C" is illuminated
7 August 2022 English London Underground signal with illuminated 'pigs ear' aspect Flickr user ID: 47739225@N08 author name string: citytransportinfo URL:
22980774@N05 URL: https://www.flickr.com/photos/22980774@N05 author name string: SignalPAD publication date: 21 January 2008 described at URL: https://www.flickr