Bausch & Lomb c.1910s Antique Colorimeter w/ Hexagonal Glass Prisms
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Description -m- Item # 21005008
Vintage antique Bausch & Lomb Colorimeter, with hexagonal prism-like solid glass optical pieces. Date of manufacture unknown but presumed to be 1910s or early 1920s as no patent numbers are present on the nameplate. Similar in design to patents issued in the 1930s. Nameplate reads: Bausch & Lomb Optical Co. Rochester, N.Y. U.S.A. No. 8543, Pat. Appl’d.
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