The violin that my mother purchased from Luthier Rosenthal in New York in 1967 and played in the Rochester Philharmonic has been in my possession for more than twenty years, except for periods on loan to colleagues or students at the Bard Conservatory of Music. The label reads Carlo Ferdinand Landolphi 1750, but we are unsure of its provenance—I have shown it to prominent violin experts in Boston, New York, Philadelphia, and Los Angeles, and they don't agree with each other. Some think it's from Florence, others a Viennese copy, late 18th century, but not attributable to any known maker with certainty. Regardless, it has a beautifully resonant "Italian" kind of sound, and has been admired by a number of fine players.
Here it is in action, played by one of the Bard students: Sibelius concerto and also Bach chaconne (!)