Power supply for Japanese mark 32 type military short-wave infantry radio transmitter from the World War 2 era. Note: many markings appear to be made with radium paint so as to glow in the dark. Dr. Eiju Matsumoto examined this unit in 2004 and was unable to determine the maker. Reference: See War Department Technical Manual TME11-227A, "Japanese Radio Communications Equipment," Dec. 1944, for identification and technical information.
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