Due to the obvious resemblance, the 1940’s era D4 manufactured by the American Microphone Company belongs to a group of microphones known as “salt shakers.” Relatively heavy and durable, it was commonly used for broadcast in the US military, and later became a favorite of harmonica players. The item shown below recently sold on eBay for $73.51. UPDATE: I think I spotted this microphone in the great American classic comedy Airplane!. Photos below.
American Microphone Company Model D4