| Country of Origin | United States |
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Check the listing for details. Antique Bausch & Lomb Metallurgical Microscope w/ Illuminator Scientific Lab. Condition: Used, Made in United States. Listed at 375.00 USD. Maker: Bausch & Lomb Optical Co., U.S.A. No. 33-45-01 (based on patent markings). Patents: U.S. Pat. Nos. 1,622,350 and 2,093,605 (engraved on illuminator). Illumination: Built-in vertical illuminator with B&L triangle logo.