This listing is for 2 books of sheet music for Book 1 of J. F. Mazas's "Twelve Petits Duos Progressifs" Op. 70 for 2 violins. Included is the sheet music for Violin 1 and Violin 2. They are pre-owned in good condition. There is some light wear and dirt on the covers. A name is written on the front covers. The music for Violin 1 has some handwritten notes. The pages in both books have some light dirt.