Secrecy notice for telegrams, 1900-1950

Made:
1900-1950 in Chelmsford
Secrecy notice in wood frame Secrecy notice in wood frame Secrecy notice in wood frame Secrecy notice in wood frame
Secrecy notice in wood frame Secrecy notice in wood frame Secrecy notice in wood frame Secrecy notice in wood frame

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Secrecy notice in wood frame
On loan from the Museum of the History of Science|Enquiries to Science Museum, London

Secrecy notice in wood frame
On loan from the Museum of the History of Science|Enquiries to Science Museum, London

Secrecy notice in wood frame
On loan from the Museum of the History of Science|Enquiries to Science Museum, London

Secrecy notice in wood frame
On loan from the Museum of the History of Science|Enquiries to Science Museum, London

Secrecy notice in wood frame, made by Marconi's Wireless Telegraph Company Limited, Chelmsford, Essex, England, 1900-1950

Details

Category:
Radio Communication
Object Number:
1959-207
Materials:
paper (fibre product), glass and wood (unidentified)
Measurements:
overall: 270 mm x 210 mm x 15 mm, .4662 kg
type:
regulatory sign
credit:
Lent by the Museum of the History of Science

Related Objects

High frequency sliding inductance on wood base, 1900-1950

Wooden pillar insulators, 1900-1950

Stud field regulator, 1900-1950

Copper busbars and ebonite insulators, 1900-1950

Rotary convertor, 1900-1950

Guard lamps on wooden board, 1900-950