http://www.ebay.com/itm/181941297633

the seller is Bob Van Dyke out on Long Island. Note that some art hill and dale World Broadcasting 
disks. The World Broadcasting labels indicate the disks were made in the former original NBC radio 
network center at 711 Fifth Avenue, later WMGM and later Fine Sound Studios. That space currently 
houses a Screen Writers Guild archive.The building is now owned by Coca-Cola Co, which acquired it 
from Columbia Pictures (kept the building, sold the movie studio to Sony), which had acquired it 
from Loews/MGM.

-- Tom Fine