Physical description

A small pocket size folding magnifier used for enlarging detail when reading maps or examining aerial photographs complete with a leather storage pouch. Manufactured of brass by Casartelli of Manchester, England. When unfolded this forms a "U" shape with the glass lens positioned conveniently for map viewing and the base can be used to measure scaled distances.

Inscriptions & markings

This item is stamped "CASARTELLI, MANCHESTER" and has 1/4, 1/2 and 1 inch markings.