"This famous tenor, like its counterpart, the "Medici" tenor by Antonio Stradivari, 1690, now in Florence, Italy, and the violino piccolo by the Brothers Amati, 1613, in the Witten-Rawlins Collection, is one of three known seventeenth-century Cremonese instruments to have survived in original condition."
"Insofar as I know, it is the only Guarneri tenor there is. . . This noble instrument is not only the only Andrea tenor in existence; it is one of the few Cremonese tenors that have come down to us."
Guided Tour through the Shrine to Music's Galleries, Charles Beare, Journal of the Violin Society of America, Vol. XII, No. 2, Flushing, NY