MOZART Wolfgang Amadeus (1756-1791). Sinfonie concertante for Violin & Viola, composed by W.A. Mozart. Work 104 (Offenbach sur le Mein chez Jean André, [1802]); 9 parts in-fol. (34.5 x 25 cm) in sheets, in a modern folder with flaps back to canvas. Very rare first edition of the Symphonie concertante for violin and viola K. 364, complete with all solo and orchestral parts . Music engraved with the quotation number 1588, the two solo parts with title forming a cover decorated with a charming engraved vignette . Violino principale (9 p.), Viola principale (9 p.), Violino primo (5 p.), Violino secondo (5 p.), Due viole rip. (6 p.), Basso è violoncello (4 p.), Oboe primo (2 p.), Oboe secondo (2 p.), Corno primo (2 p.), Corno secondo (2 p.). Plus an early copy of the part by Basso & Violoncello ( 11 p.). Haberkamp has listed only four copies of this edition, all the more precious as the absence of the manuscript makes it the reference source . Bibliography: Gertraut Haberkamp, Die Erstdrücke der Werke von Wolfgang Amadeus Mozart (Tutzing, 1982), p. 159; RISM M 5752.