This Polish cinderella label promotes Ars Polona, a major cultural export company based in Warsaw, Poland. The design features a stylized black Pegasus emblem—symbolizing art, literature, and imagination—set against a bronze-gold background. Below, the firm’s address and activities are listed, highlighting its role in exporting books, periodicals, postage stamps, numismatic items, medals, and more. Such labels were often included in philatelic mailings and catalogs, serving both as advertising and collectible ephemera from Poland’s cultural trade sector.