Block instrument (lock and block)
1897
Signal Block Bell, South Eastern Railway
1862
Train staff and ticket box
Telegraph block instrument
Wise's Patent Train Staff
1886
Five-needle train signalling instrument used on the London and Blackwall Railway
1840
British Railways Detonator Tin
Telegraph block instrument; 3-position single-needle
Telegraph block instrument (sending), Great Northern Railway
Specimen of First Telegraph Line, 1837
1837
Block instrument (permissive indicating)
Cooke's train signalling instrument of 1845, Norfolk Railway
1845
Clark's block signalling telegraph instrument, 1854
1854
Exploded Duplex Detonator
Telegraph block instrument
Station bay indicator
Telegraph block instrument, Great Eastern Railway
Telegraph instrument; single needle
Telegraph block instrument; Walker's
1865
Telegraph Block Instrument, Tyers Train Describer
Telegraph block instrument; South Eastern Railway; Walker's patent No. 245
1855
Telegraph block instrument, South Eastern Railway
circa 1905
Signalling instrument
Single-needle block instrument
1845
Telegraph block instrument (sending and receiving)
Telegraph block instrument; "Niddrie North"; made by W R Sykes Interlocking Signal Co Ltd
Tyers Train Describer, North British Railway
Train Describer, 1880-1920
1880-1920
Two-plunger block instrument pattern 288
Telegraph block instrument (sending)
Telegraph block instrument (sending and receiving)
Telegraph block instrument, early Walker's type
Signalling instrument
Telegraph block instrument; Walker's type
Signal relay box
Telegraph block instrumet; "Niddrie North Junction"; made by W R Sykes Interlocking Signal Co
Pair of climbers for climbing telegraph poles
1948
Signalling instrument
Reversible line indicator
Great North of Scotland Railway Detonator Box
Telegraph block instrument, Preece's type
Double needle telegraph instrument
Telegraph block instrument in green metal case
Block instrument
Telegraph block instrument (sending)
Intermediate block instrument
Spagnoletti intermediate signalling instrument
1885
Block instrument (sending)
