- "A magnificent violoncello that is certainly of the maestro's finest work. Perfect and characteristic in all respects
from the model to the style of workmanship and to the varnish that is of an excellent quality."
- Liuteria Italiana dell'ottocento e del novecento, Umberto Azzolina, Casa Editrice Geschina, Milan, 1964.
Certificate: Helmuth A. Keller, Philadelphia, August 14, 1973
Certificate: Loránd Rász, 's-Gravenhage