Bausch & Lomb 81-34-35 Hastings measuring magnifier; magnification; 7x

Optical precision comes from bonding together a double convex element and two concave elements of different types of glass. The transparent body allows illumination to fall on magnified area; body is threaded so you can focus the lens. Lens slides are coated black to block glare.
Optional measuring scales (sold separately) screw onto the bottom of the lens.
What's included: protective leather case.