NARBA Frequency Change Spots 1940
 NARBA re-allocation radio spots produced by RCA
 
Re-Alloctation Spot 1  Re-Alloctation Spot 8
 Re-Alloctation Spot 2  Re-Alloctation Spot 9
 Re-Alloctation Spot 3  Re-Alloctation Spot 10
 Re-Alloctation Spot 4  Re-Alloctation Spot 11
 Re-Alloctation Spot 5  Re-Alloctation Spot 12
 Re-Alloctation Spot 6  Re-Alloctation Spot 13
 Re-Alloctation Spot 7  
A set of commercials explaining the changes in dial position of radio stations which took place on March 29, 1941.