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Portable Telephone Set

Portable Telephone Set
Manufacturer unknown Poland, 1967 y.

Produced from 1960 to 1970. Portable Telephone Set 1967, Poland Field telephone (incomplete set).
The first field telephone was used by the Germans during World War I. It replaced the old flag system and the telegraph. A field telephone is a kind of telephone designed for use in special circumstances requiring operational mobility. It was primarily designed for communication during battle.