Instructions for Gecophone Crystal Detector Sets

Maker
General Electric Co Ltd
Production date
(Early 20th Century) {nd}
Description
Instruction booklet for Gecophone Crystal Detector Sets Nos 1 & 2 (Booklet No B.C. 2868)

Object Detail


Department
Level of current record
Item
Production date
(Early 20th Century) {nd}
Measurements
16pp
Accession number
A319.003

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