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pdf Btmc 7001-dial-sets Popular

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btmc_7001-dial-sets.pdf

Btmc 7001-dial-sets

from the book: Western Electric Machine Switching System (extract)
Author: Bell Telephone Manufacturing Company Ltd. Antwerp
text and pictures related to dial and subscriber sets, ? 1910

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pdf Btmc 7002 Dial Maintenance Popular

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btmc_7001_dial_maintenance.pdf

Btmc 7002 Dial Maintenance

No. 7002 type dial (maintenance instructions), ED. 7302, September 1923
Published by the International Western Electric Company Incorporated
European? Engineering Department, Division No.1
From a black binder titled "No 7-A Machine Switching System"
which holds the 7000 series "ED" instructions
label inside reads: "Book No. 1014 Date April 20 1923
Assigned to Mr. A E Reinke (Riga), this book will be kept up to date, ED instructions"

pdf BTMC ITT Pentanconta 1000 Popular

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BTMC_ITT_Pentanconta_1000.pdf

BTMC ITT Pentanconta 1000

40 page booklet about the Pentaconta Local Telephone Switching System (Pentaconta 1000 crossbar switch)

pdf BTMC Mechanoelectric Telephone Switching System Popular

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BTMC_Mechanoelectric_Telephone_Switching_System.pdf

BTMC Mechanoelectric Telephone Switching System

43 page booklet

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