The Antique Bausch and Lomb Tripod Map Loupe is a vintage magnifying glass with a metal frame, designed specifically for optometry work. Manufactured in the United States before 1930, this magnifying glass bears the mark of renowned maker Bausch & Lomb, known for their high-quality optics products. The classic design and sturdy construction make it a valuable addition to any collection of medical or scientific antiques. Very useful for scrutinizing old coins and stamps.