Popular was one of labels belonging to Sound Recording Company (Swallow Street, Piccadilly, London), in use between 1913 and 1923. There was one catalogue series, with numbers from P-1 to more than P-1200. Many records were re-issues of what had been previously published under label Grammavox (1910-1915) of the same company using different series and catalogue numbers. Records themselves were pressed in England by Crystalate. For more info and catalogs, see http://mgthomas.co.uk/Records/LabelPages/Popular.htm and http://mgthomas.co.uk/Records/LabelPages/Grammavox.htm