The earliest Rex Records was a United States based label owned by the Rex Talking Machine Corporation of Wilmington, Delaware. The company was in business from 1912 through 1919. They issued vertical cut double-sided disc records compatible with the Pathe Records system.
The second Rex Records was a United Kingdom based label founded in 1933 by the Crystalate Gramophone Record Manufacturing Company, also the parent of British Imperial Records. Rex Records were sold at the Marks & Spencer chain stores. The label was discontinued in February of 1948.