1927 map of American radio stations

Compiled, drawn & published by Richard F[riend] Lufkin, Chamber of Commerce Bldg., Boston, RADIO BROADCAST STATIONS OF THE UNITED STATES & CANADA. Boston: Richard F. Lufkin, 1927.
15 3/8”h x 27 3/8”w at neat line plus margins. Vertical centerfold, else excellent condition.
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An unrecorded thematic map of the United States listing the locations and call letters of American radio stations in 1927. Each circle on the map bears call letters identifying a single station, and insets are used for urban areas with a high density of broadcasters, as for example in Chicago, Los Angeles and New York. The map is an artifact of a time when it was still cool to “collect” radio stations, and is designed so that avid listeners can “check off” all the stations they hear. 

“Richard Friend Lufkin [1895-1963] was a professional civil engineer and head of the Richard Lufkin Company (engineers, draftsmen, artists, and cartographers). He was an Abraham Lincoln scholar and published a number of writings and illustrated maps revolving around Lincoln and his time spent in New England. He was also a popular speaker around New England on Lincoln related topics.” (“Guide to the Richard F. Lufkin Collection,” Bridgewater State University)

References
Not in OCLC or Rumsey (July 2019).