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Actions	Details Remove from selection Add to selection Title Observation set: summary of operating Reference UK0108 NAEST 021/295-6 Date 1911-01 to 1911-02 Scope and Content Typescript table showing information on operating of observation set. Includes information on number of calls, take, time taken to answer, time taken to disconnect and problems. Physical description Number of pieces: 1, Pages/folios: 2 Language English. Subject Telephone exchanges, South Africa Conditions governing access Open Level of description file Hierarchy browser 110000001 NATIONAL ARCHIVE FOR ELECTRICAL SCIENCE AND TECHNOLOGY contains 322 parts UK0108 NAEST 021 Baker Collection: Further Papers of Sir William Henry Preece contains 155 parts UK0108 NAEST 021/295-6 Observation set: summary of operating

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Title
Observation set: summary of operating
Reference
UK0108 NAEST 021/295-6
Date
1911-01 to 1911-02
Scope and Content
Typescript table showing information on operating of observation set. Includes information on number of calls, take, time taken to answer, time taken to disconnect and problems.
Physical description
Number of pieces: 1, Pages/folios: 2
Language
English.
Subject
Telephone exchanges, South Africa
Conditions governing access
Open
Level of description
file

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