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Strowger step-by-step automatic telephone exchange switch, 1897-1898

Telecommunications

1897-1898

Strowger pre-2000 type group selector, 1920-1926

Telecommunications

1920-1926

Cisco Catalyst 1200 switch, 1994

Computing & Data Processing

1994

Strowger two-motion selector with vertical mount, 1903-1920

Telecommunications

1903-1920

selector switch, 1903

Telecommunications

1903

Telephone crossbar switch, Swedish Ericsson, 1921

Telecommunications

1921

polarized 'guillotine' relay, 1862-1866

Telecommunications

1862-1866

Telephone crossbar switch RVD 211, 1970

Telecommunications

1970

Zither switch with open-wire multiple and two-motion ratchet drive, 1894

Telecommunications

1894

Director switching device, 1927

Telecommunications

1927

coaxial switch from 'Oscar One' CB transceiver, 1980-1983

Radio Communication

1980-1983

Strowger 2000-type two-motion final selector, made by British Telecom, British, 1936-1980

Strowger 2000-type final selector, 1936-1980

Telecommunications

1936-1980

Bank of 50 Keith Line Switches, 1920-1925

Telecommunications

1920-1925

Electrical switch for physiological use, London, England, 1920-1940

Laboratory Medicine

1920-1940

Director switching device, 1927

Telecommunications

1927

Bank of 50 Keith Line Switches recovered from a rural exchange in New Zealand, made by the Automatic Electric Company, Chicago, United States, 1920-1925.

bank of 50 Keith Line Switches, 1920-1925

Telecommunications

1920-1925

Part-rack, marked R5 B15, of group selectors No 7009, for Western Electric No 7-A machine switching system, made by Bell Telephone Manufacturing Company SA, Antwerp, Belgium, 1920-1940

part rack of group selectors from Western Electric Rotary automatic exchange, 1920-1940

Telecommunications

1920-1940

Sinclair line selector step-by-step sending instrument, patented by David Sinclair, probably made by the National Telephone Company, British, 1880-1890

Sinclair line selector step-by-step sending instrument, 1880-1890

Telecommunications

1880-1890

Strowger pre-2000 type group selector with line banks, mounted on stand, made by the Automatic Telephone Manufacturing Company, Liverpool, England, 1920-1926.

Strowger pre-2000 type group selector, 1920-1926

Telecommunications

1920-1926

Wylex 60 Amp switches

Electricity Supply

Five hundred-line switch RVA 30314, 1970

Telecommunications

1970

Wylex 60 Amp switches

Electricity Supply

electric switch

Electricity Supply

Two separate line banks sent with bank of 50 Keith Line Switches recovered from a rural exchange in New Zealand

two line banks from Keith line bank, 1920-1925

Telecommunications

1920-1925

Final selector No 7009, for Western Electric No 7-A machine switching system, made by Bell Telephone Manufacturing Company SA, Antwerp, 1920-1940

final selector switch from Western Electric Rotary automatic exchange, 1920-1940

Telecommunications

1920-1940

electric switch; on a thick plastic board. Has brass parts, and a wooden handle. Manufactured by Woodhouse & Rawson

Electric switch manufactured by Woodhouse & Rawson

Electricity Supply

1900

Spare individual plunger switch sent with bank of 50 Keith Line Switches recovered from a rural exchange in New Zealand

spare switch from Keith line bank, 1920-1925

Telecommunications

1920-1925

Part-rack, marked R5 B17, of line finders No 7002, for Western Electric No 7-A machine switching system, made by Bell Telephone Manufacturing Company SA, Antwerp, 1920-1940

part rack of line finders from Western Electric Rotary automatic exchange, 1920-1940

Telecommunications

1920-1940

Strowger pre-2000 type final selector with line banks, mounted on stand, made by the Automatic Telephone Manufacturing Company, Liverpool, England, 1920-1926.

Strowger pre-2000 type final selector, 1920-1926

Telecommunications

1920-1926

Two pre-2000 two-motion selectors sent with bank of 50 Keith Line Switches recovered from a rural exchange in New Zealand

two-motion selectors from Keith line bank, 1920-1925

Telecommunications

1920-1925

Strowger pre-2000 type final selector with line banks, mounted on stand, made by the Automatic Telephone Manufacturing Company, Liverpool, England, 1920-1926.

Strowger pre-2000 type final selector, 1920-1926

Telecommunications

1920-1926