Western Union polar relay 17B, dated 14.12.1915

Made:
1915
Western Union polar relay 17B, dated 14.12.1915

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Western Union polar relay 17B, dated 14.12.1915
Science Museum Group
© The Board of Trustees of the Science Museum

Western Union polar relay 17B, dated 14.12.1915

Details

Category:
Telecommunications
Object Number:
1968-460
type:
relay
credit:
Baker, R.L.