Bidspirit auction | An Assortment of Mid-Century Industrial

An Assortment of Mid-Century Industrial Glass Lenses and a Metal Flange - An assortment of industrial glass lenses and a metal mounting flange, likely of maritime or aeronautical utility. The collection includes a heavy yellow-tinted glass prismatic lens featuring a deep radial beehive or conical fluting pattern designed to diffuse and intensify light. Also present is a circular clear glass Fresnel-style lens with concentric raised rings on the interior surface for light focusing, and a smooth clear glass hemispherical domed lens. The group is completed by a circular metal mounting flange, constructed from copper or brass with a heavy green verdigris patina, which houses a thick flat circular glass lens secured by a retaining ring. The flange features five pre-drilled mounting holes for installation. No maker's marks, patent numbers, or model identifiers are visible on the glass elements or the metalwork.