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

Telecommunications

1897-1898

Cisco Catalyst 1200 switch, 1994

Computing & Data Processing

1994

Telephone crossbar switch, Swedish Ericsson, 1921

Telecommunications

1921

Telephone crossbar switch RVD 211, 1970

Telecommunications

1970

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

Telecommunications

1903-1920

polarized 'guillotine' relay, 1862-1866

Telecommunications

1862-1866

selector switch, 1903

Telecommunications

1903

Director switching device, 1927

Telecommunications

1927

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

Telecommunications

1894

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

Strowger pre-2000 type group selector, 1920-1926

Telecommunications

1920-1926

Bank of 50 Keith Line Switches, 1920-1925

Telecommunications

1920-1925

Director switching device, 1927

Telecommunications

1927

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

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

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

Laboratory Medicine

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

Wylex 60 Amp switches

Electricity Supply

Strowger pre-2000 type final selector, 1920-1926

Telecommunications

1920-1926

Five hundred-line switch RVA 30314, 1970

Telecommunications

1970

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

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