The “Romer, C.M. Sin” G.B. Guadagnini Violin of 1753 is a characteristic example of Guadagnini’s Milan-period. It was owned by some of the most notable collectors, including C.M. Sin from Hong Kong, and is also a top concert instrument. The violin was sold twice by the firm W.E. Hill & Sons, and is a particularly noteworthy example since it is prominently featured in the Duane Rosengard publication.