A finely lacquered brass 'bull's-eye' adjustable condenser lens on stand, suitable for magnifying close work such as tying fishing flies, philately, or entomology, where it can be used for quick identification before microscopic examination. Features include adjustable height, rotation, and tilt angle of the lens. Circa 1900.
Dimensions: 3.5 cm/1⅜ inches (lens diameter) x 18 cm/7⅛ inches (max. height from bottom of base to top of ball stand).
