Tyers Train Describer, North British Railway
Telegraph block instrument, South Eastern Railway
circa 1905
Telegraph block instrument (sending)
Telegraph block instrument
Telegraph block instrument (sending/receiving)
Telegraph block instrument (sending and receiving)
Telegraph block instrument (sending and receiving)
Telegraph block instrument; "Niddrie North"; made by W R Sykes Interlocking Signal Co Ltd
Telegraph block instrumet; "Niddrie North Junction"; made by W R Sykes Interlocking Signal Co
Telegraph block instrument, early Walker's type
Cooke and Wheatstone double needle telegraph, 1844
1844
Telegraph block instrument; Walker's
1865
Single-line instrument (sending/receiving)
Telegraph block instrument in green metal case
Telegraph block instrument; Walker's type
Telegraph block instrument; South Eastern Railway; Walker's patent No. 245
1855
Telegraph block instrument, Preece's type
Telegraph instrument; single needle
Telegraph block instrument, Great Eastern Railway
Telegraph block instrument
Telegraph block instrument (sending/receiving)
Telegraph block instrument (sending)
Double needle telegraph instrument
Telegraph Instrument, "15 to Mitcham Junction"
Peas & Partners Alphabetical Telegraph Instrument
1846
London & North Western Railway telegraph block instrument
experimental Lodge-Muirhead wireless telegraph receiver, 1900-1910
1900-1910
Three telegraphic signalling block instruments
Telegraph Sender
1918-1923
Morse Key
1940-1945
Telegraph Instrument, Sutton Junction
Route indicator, Caledonian Railway
Telegraph Instrument
Fletcher's double-line block instrument, London & North Western Railway
Great Western Railway Lamp Indicator
Telegraph block instrument; Sykes' Lock and Block with integral semaphore indicator
Telegraph block instrument; GER. Sykes 2-needle (Up/Up Line) 3-position absolute pegging/non-pegging instrument
Telegraph Block Instrument; Tyers Train Describer
Alexander Bain's telegraph instrument
1846
Alexander Bain's telegraph instrument
1846