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A Century of Progress %u2022 Vintage PostcardsExhibitor & Concessionaire PostcardsThe Century of Progress \for Millions of Radio ListenersSouvenir of the World's Fair, Chicago, Ill., from the COLUMBIA BROADCASTING SYSTEM, \est Radio Network\National Cash Register CompanyA view of The National Cash Register Company booth in the Industries Building, Century of Progress, Chicago, where the products of the Company are on display. Throughout the Exposition, 1,300 National Cash Registers and Accounting Machines are used to check food, register sales, and give the Fair management control figures.
