Keys for Roman & Medieval Locks 1930 Lithograph

A very nice 1930 lithograph print depicting various keys and their designs for Roman, Italian, German and other medieval locks.

From a Series Produced for Encyclopedias during 1910s-1930s

Such images produced for encyclopedic use are usually not available from any other sources and offer unique and often rare images.

Print is approx 6.5" x 9.5" (text and/or other images on reverse).