Feltman's first product, manufactured circa 1939-1941. Reportedly only 10 of these are known, and these were used at Coney Island Amusement Park in New York and the 1939 World's Fair in San Francisco. This example is photographed and described on page 550 of "Blue Book of Airguns, Thirteenth Edition". Powered via hose fed from an air compressor (not included) with full auto 600 RPM capability for use with steel BBs. One of the two rear sight screws is absent. Mechanically untested. Provenance: The Dr. Robert D. Beeman Collection