Berliner Telephone Transmitter. Round, walnut base with short induction coil set in the back, flat metal plate on front with projecting mouthpiece. 4 binding posts. Marked: "Berliner Transmitter / Patented Mar 7 '76 Jan.30 '77 July 15 '79". Stamped on back: "For Export / Not to be used in the U.S."
A replica of the original KDKA radio transmitter. The caption from a 1959 Westinghouse publicity photo reads as follows: "Replica of ·Historic Radio Equipment Donated to Smithsonian Institution. Pittsburgh, Pa . Jan. 13 -- Exact replicas of the historic radio equipment used in the [1920] broadcast of presidential election results have been
donated to the Smithsonian Institution in Washington , D. C., by the Westinghouse Broadcasting Company. Equipped with a similar unit, radio station KDKA transmitted the results of the Harding-Cox election on Nov. 2, 1920, from atop the Westinghouse East Pittsburgh plant. ... The original station had a power output of 100 watts, as compared to the 50,000 watts of today's KDKA transmitter in Allison Park, Pa. The first KDKA unit eventually was converted into a telegraph transmitter and given to the Pennsylvania State Police for use at their barracks in Butler."