Beethoven, Ludwig van. (1770–1827) [Mahr, Joseph. ?–?] [Septet, Op. 20] Quintuor pour Flute, Violon, deux Violes et Violoncelle arrangé d'après le Septuor, Oeuvre 20... par Joseph MahrDisbound upright folio. 31 pp. Engraved throughout. [PN] J. Cz. 2639. Flauto: Title, 213 pp.; Violin: blank, 29 pp.; Viola Primo [sic]: blank, 29 pp.; Viola Secondo [sic]: blank, 29 pp.; Violoncello: blank, 29 pp. Part names in English added in ink to title and initial blank pages; markup in pencil including directives in English uniformly added to all parts. 13 x 10 inches (33. 3 x 25. 4 cm). Outer bifolium of Flauto part detached and torn to spine;