Production year
1921
© Fonds historique / CNRS Images
Reference
19000001_1210
Projecteur photographié le 13 décembre 1921
Projecteur, laboratoire du Génie, photographié le 13 décembre 1921. Office national des recherches scientifiques et industrielles et des inventions. Extrait du livre Inventions 1915-1939 de Luce Lebart.
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