Hall Signal Company - Wikipedia
Ground Discs and Shunt Signals
10 Railway Disc Signal Images, Stock Photos & Vectors | Shutterstock
The Position Light: Hall Disc (aka Banjo) Signals Explained
Southern-pattern ground disc signal, Norden, Swanage Railw… | Flickr
2 position signals
Railway Signals and Sign Boards Meaning | Guruji Skills
Ground Discs and Shunt Signals
2 position signals
10 Railway Disc Signal Images, Stock Photos & Vectors | Shutterstock
Track Signalling Equipment Points Disc Stock Photo - Image of croatia, station: 124253322
GS06/1: GWR 1920 16″ Disc Ground Signal Kit (pack of 2) – Wizard Models Limited
October 2018 - Roundhouse Brown Marshall Disc Signal - Association of 16mm Narrow Gauge Modellers
Shunting Signals
Ground shunting signal on a UK railway line. The disc shunting signal signals permission for trains to make short shunting movements Stock Photo - Alamy
Shunting signal hi-res stock photography and images - Alamy
Dwarf disc signal at C&NW Chicago Passenger Terminal | Flickr
Hall Disc Signal | Tracking the Light
GS08: LNER upper quadrant disc ground signals – Wizard Models Limited
Signal - MVP Disc Sports
2 position signals
