A concave glass of glass for spotlights, reflectors, etc.

A concave mirror of glass for spotlights, reflectors, etc.: No. 15145. Declared.01/26/1906.Issue 02/28/1909 / "Karl Zeiss".- [B.M .: B. and., 1909].-387-388 p., 1 l.Il .. -Description of a concave glass of glass for spotlights, reflectors, etc.To the privilege of a foreign company "Carl Zeiss" (Carl Zeiss), in the city of Jena, in Germany, declared on January 26, 1906 (og. St. No. 28489).Group V. No. 15145. February 28, 1909.I. Zeiss Karl, company.Yena 1.People (collection).Electronic copy source: PBOriginal storage location: VPTB FIPS