"The Vincenzo Rugeri violin we offer was bought twice by the Baron. First he gave it to a young Russian prodigy named Gregorowitsch, who was a student of Joseph Joachim. Hill & Sons states that Gregorowitsch had "gone bad" and was "murdered by the Bolsheviks." When the Rugeri eventually made its way back to the Hill & Son firm, the Baron purchased it for a second time and presented it to the Baroness for her use.
Hill & Sons states, ". . .the handsome Francesco Rugeri, which we sold to Baron Knoop. . .is one of the finest by this maker that we have ever seen."
It is our opinion that this violin was made circa 1700 (later than Hill & Sons' estimate) not by Francesco, but by one of his sons, Vincenzo Rugeri, whose work has become recognized on its own merit. His design is more advanced than his father's with broader and flatter arches. This violin is built on the grand pattern, from maple of exquisite beauty. Vincenzo frequently made violins using spectacular wood, covered with the finest, most transparent varnish. As one would expect, the sound is also advanced. It possesses the Cremonese timbre but also the power that was desired in Cremona during the time of Stradivari's ascendancy."
Reuning & Son Violins Newsletter, Fall, 2005, Reuning & Son Violins Newsletter, Fall, 2005, Boston