Production year
1936
© Fonds historique/colorisée pour Armand Colin/CNRS Images
Reference
19000001_0990
Casque acoustique, photographié le 31 mars 1936. Office national des recherches scientifiques et ind
Casque acoustique, photographié le 31 mars 1936. Office national des recherches scientifiques et industrielles et des inventions. Ce casque est conçu pour une utilisation civile et destiné avant tout aux malentendants.
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