

This is a vintage "Pittsburgh Dirigible Searchlight" manufactured by Pittsburgh Electric Special. The name likely refers to a searchlight used to spot dirigibles or airships, which were used for both reconnaissance and bombing during World War I. The most famous dirigibles were the Zeppelins, which were used by the German military. This light appears to be on good condition, with no cracks, but is untested.
If you have any questions or need additional photos please let me know.