- 1 titled lower left “Second Quartet Opus 1”
numbered lower center “19/30”
signed and dated lower right “Boulata 94”
- 2 titled lower left “First Quartet Opus 2”
numbered lower center “23/30”
signed and dated lower right “Boulata 94”
- 3 titled lower left “First Quartet Opus 3”
numbered lower center “23/30”
signed and dated lower right “Boulata 94”