Double surface of revolution of constant negative curvature
1910
Burroughs Class 5 hand operated mechanical adding machine with ten registers
1920-1925
Burroughs hand operated adding and listing machine
1917
Revolution of constant negative curvature
1910
Hobbs-type artificial left hand, Europe, 1918
1918
Model of LNWR Third Class railway carriage
1907-1917
Helmet, Great Western Railway, Fireman
1912
Model LNWR luggage carriage, c 1912
1907-1917
model steam locomotive London, Brighton & South Coast Railway
1925
Model London & North Western Railway carriage
1907-1917
War memorial plaque, South Eastern & Chatham Railway
1914
cane presented to Mr. Sidney Foreman for his first-aid work at the Charfield railway disaster
1924
Novelty model
1955; 1830
Lapel badges, France, 1915-1917
1915-1917
Model of Chambers' Signal Interlocking Frame
c.1912
The Munition Girls
1918
Glass necklace worn to prevent bronchitis, Greenwich, London, 1914
1914
Dental anaesthetic syringe
1907-1920
Amulet brooch in the shape of a black cat
1914-1918
Anatomical model of the spine
1901
Handcuffs, steel
1918
Gas mask, Germany, 1915-1918
1915-1918
Coolidge X-ray tube, 1913-1923.
1913-1923
Red Cross fund-raising brooch made from Zeppelin wire, 1917.
1916-1917
Gecophone broadcast receiver, model B.C 3200, 1924
1924
Impulse sender (dial), 1915
1915
Radio tuning coil No. 300, 1922-1923
1922-1923
Radio tuning coil No. 100, 1922-1923
1922-1923
Telephone crossbar switch, Swedish Ericsson, 1921
1921
Radio tuning coil No. 200, 1922-1923
1922-1923
Radio tuning coil No. 150, 1922-1923
1922-1923
Amplion loud speaker with wooden horn, 1925
1925
De Forest audion 1906-1915
1906-1915
Loud speaker valve type L.S.5. W/T, 1923
1923
Strowger automatic telephone, 1901-1910
1901-1910
Silicon crystal for wireless telegraphy, mounted in a locket, 1906-1916
1906-1916
Strowger calling dial, 1906
1906
Sample of four-core telegraph cable connecting Vancouver Island with the mainland
1904
Aerial inductances, 1901
1901
Murray multiplex tape transmitter, 1910-1920
1910-1920
Replica of the first Morse telegraph, 1835
1934
Billi condenser used for aerial tuning in Newfoundland, 1901
1901
De Forest syntoniser, 1902-1907
1902-1907
Model of a pendulum clock based on Galileo's design
1921
Rolling ball clock by E. Dent and Co
1920
Tourbillon watch manufactured by Nicole Nielsen and retailed by S Smith & Son
1907
Field medical pannier
1914-1918
X-ray plates
1914-1918
Telegraph block instrument, South Eastern Railway
circa 1905
Gold amulet in the form of a cobra
2000-100 BCE