Train Describer, 1880-1920
1880-1920
Telegraph block instrument; 3-position single-needle
Telegraph block instrument (sending), Great Northern Railway
Telegraph block instrument; G. K. Winter/J. Craik (Patents: 1880/1885)
Telegraph block instrument; G. K. Winter/J. Craik (Patents: 1880/1885)
Telegraph block instrument; GNR
Telegraph block instrument; BR (LNWR-Fletcher's Style)
Telegraph block instrument, Midland Railway
1911
Preece's-type telegraph block instrument
Telegraph block instrument, Spagnoletti
Spagnoletti keyless disc type block instrument
Telegraph Block Instrument (Sending)
Telegraph block instrument
Telegraph block instrument (permissive)
Telegraph block instrument, "To Crews Hill"
Telegraph Block Instrument, Train Describer
Telgraph block instrument
Telegraph block instrument (receiving)
Telegraph block intstrument (permissive)
Telegraph block instrument
Telegraph block instrument; GNR (Luton-Dunstable Branch)
Telegraph block instrument
Telegraph block instrument (sending)
Telegraph block instrument (receiving)
Telegraph block instrument (sending)
Sykes' Electric-Release Box for Telegraph Block Instrument
Telegraph block instrument (sending)
Telegraph block instrument
Telegraph block instrument (receiving)
Telegraph Block Instrument
Telegraph Block Instrument
Telegraph block instrument
Sykes' Electric-Release Box for Telegraph Block Instrument
Telegraph block instrument (sending)
Telegraph block instrument (sending)
Telegraph block instrument
Telegraph block instrument (receiving)
Telegraph block instrument (sending)
Telegraph block instrument (sending/receiving)
Telegraph block instrument, "penguin" type
Telegraph block instrument (sending/receiving)
Telegraph block instrument (permissive)
Telegraph block instrument, known as "penguin" type
Telegraph block instrument (sending/receiving)
Telegraph block instrument (sending/permissive)
Telegraph block instrument; London & South Western Railway
