Bausch & Lomb Double Lens 3.5X Magnifier

Originally designed for the exacting work of hand-tooling photo-engraved printing plates, the Bausch + Lomb Double Lens Magnifier provides 3.5X magnification and offers near-universal application in precision work. The magnifier uses two plano-convex glass lenses for a "corrected" wide, flat field.
Lens Diameter: 44.2mm
Diopter: 14
Focal Disctance: 3 inches
Lens Type: Glass