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In the 1930's, Japanese overseas broadcasting was a cooperative effort between NHK, a privately owned monopoly under government supervision, and the International Telecommunications Company, which handled telegraph and point to point services. Hence the many out of band channels shown on the top card, which is for the overseas broadcasts from Nazaki in 1936. Reports from those days indicated that the 20 kw. transmitter was not very well heard in North America, particularly on the east coast.
The card at the bottom right, also from 1936, is likewise for an out of band channel.
The card at the bottom left is from 1940, by which time the Japanese had come into the regular SWBC bands and also added a station at Yamata.
NHK has issued a great many distinctive cards over the years, the middle one being an example from 1956.