Duo for violin and viola in G major, KV 423 Duo for violin and viola in G major, K423 Duo for violin and viola in B flat major, KV 424 Rondo for violin and orchestra in C major, K. 373 Adagio for violin and orchestra in E major, K. 261 Duo for Violin & Viola in G,K 423 8.Rondo for violin and orchestra in C major, K. 373 Fantasy for violin and piano in C major, D934 7.Adagio for violin and orchestra in E major, K. 261 Adagio for violin and orchestra in E major, K261;