Artwork attributed to Jefim Rojak, pupil of Kazimir Malevich and member of the avant-garde collective UNOVIS, active in the early decades of the 20th century. The composition depicts a musical instrument and is distinguished by the use of mixed media on an original sheet of musical score. The score is taken from La Gioconda by Amilcare Ponchielli, specifically Act II, Scene III, which includes the celebrated Chorus of the Sailors. The painting merges the geometric rigor of Russian Suprematism with the lyrical tradition of Italian opera, creating a visually and conceptually striking contrast of profound resonance.