The label may have appeared as early as 1940. After an initial run from 500 through 515, master numbers serve to identify the recordings with no release numbers used, beginning with a 2300 series, then a 2500 block of dubs of 1930's Hollywood Hot shots, a lone 4000, then a run of unnumbered issues with matrix numbers from an unidentified source 6004 through 6016 and 8016-8035, all anonymous. A product of Empire Recording Studios, originally located in the Empire State Building in New York City, by 1950 it had relocated to 1144 Madison Ave. Redwood City, CA. Label is black with gold print, assumed to have been pressed by the Clark Phonograph Co. of NJ. until the move to the West Coast. Late dubs have a distinctively irregular groove pitch as do Party Novelty’s.