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Two-wire telephone repeater, 1923-1925

Telecommunications

1923-1925

child's china tea plate, 1922-1923

Radio Communication

1922-1923

Roving frame

Textile Industry

1927

Savoy Hill 'Meat Safe' Microphone Stand

Television

1923

Framed poster advocating vaccination against smallpox

Public Health & Hygiene

1923

two-valve short wave radio - telephonic receiver, 1927

Radio Communication

1927

BBC printing stamp

Radio Communication

1922-1924

Spinning mule

Textile Industry

1927

Telephone crossbar switch, Swedish Ericsson, 1921

Telecommunications

1921

Director switching device, 1927

Telecommunications

1927

Desk telephone transmitter and receiver (sectioned), 1926.

Telecommunications

1926

Brownie crystal receiver and pair of Lissen headphones, 1924-1927

Radio Communication

1924-1927

Three-valve radio receiver, 1922-1925

Radio Communication

1922-1925

Power loom

Textiles Machinery

1926

No. I.T. Morse tape printer, 1925

Telecommunications

1925

Gecophone crystal detector radio set no. 1, 1923

Radio Communication

1923

Marconi-Sykes Magnetophone

Television

1923

McKay artificial left arm

Orthopaedics

1920

Wooden prosthetic hand with rigid fingers

Orthopaedics

c. 1920

Popular Wireless no. 1 vol. 1, 1922

Radio Communication

1922

Primax moving iron loudspeaker, 1924-1927

Radio Communication

1924-1927

Demonstration radio receiver

Radio Communication

1926

V2A Marconiphone receiver (long-range model) , 1922-1924

Radio Communication

1922-1924

Experimental television receiver used by JL Baird in demonstration, made 1925-1926

Radio Communication

1925-1926

Radio tuning coil No. 750, 1922-1923

Radio Communication

1922-1923

Tennis Racquet from ca. 1927.

Domestic Appliances

c. 1927

manual telephone exchange

Telecommunications

c.1920

Set concert coils, 1922-1923

Radio Communication

1922-1923

12"tenon saw by Spear & Jackson

Hand and Machine Tools

1926

Radio tuning coil No. 300, 1922-1923

Radio Communication

1922-1923

Crystal radio receiver

Radio Communication

c.1923

Amplion loud speaker with wooden horn, 1925

Radio Communication

1925

Burndept 'Ethodyne' superheterodyne receiver, 1926

Radio Communication

1926

Burroughs Class 5 hand operated mechanical adding

Mathematics

1920-1925

Lap Scales

Textile Industry

c.1920

Amplifying valve type V24, 1920-1922

Electronic Components

1920-1922

Non-loaded earth core Pacific cable, 1926

Telecommunications

1926

Radio tuning coil No. 1000, 1922-1923

Radio Communication

1922-1923

locomotive worksplate

Locomotives and Rolling Stock Components

1920

Ora wireless receiving triode, 1921

Electronic Components

1921

Ceramic milk jug, London & North Eastern Railway

Passenger Comforts

1924

Cosmos DE.11 general-purpose triode valve (McVitie Weston valve collection), 1924

Electronic Components

1924

loaded submarine telegraph cable, 1926

Telecommunications

1926

Burndept Ultra IV wireless receiver, glass back No. 4798, 1923

Radio Communication

1923

telephone switch room chair

Telecommunications

c.1920

K.L.1 ungettered valve, 1920-1927

Electronic Components

1920-1927

Chain of Office, Railway Queen

Miscellanea & Curiosities

1927

loud speaker valve type L.S.5. W/T, 1923

Electronic Components

1923

Addac adding machine, marked for American currency

Mathematics

1926

Radio tuning coil No. 400, 1922-1923

Radio Communication

1922-1923