The print is part of the "Echo muzyczne" magazine., On pages [1] and [4] a round, black stamp: "NARODOWY INSTYTUT FRYDERYKA CHOPINA | BIBLIOTEKA" and a handwritten shelfmark in black link: "2683/n" on page [1]., On pages [1] and [4] a round, green stamp: "TOWARZYSTWO IM. F. CHOPINA | BIBLIOTEKA | WARSZAWA".
