This bookmark was made in the US as an advertisement for C. C. Briggs & Co. Piano Manufacturers in Boston. It is made of celluloid in the shape of a heart. The center blade has a very detailed engraved picture of an upright piano. The top is engraved "You would play upon me." Hamlet, Act III. The celluloid has a faint wood grain. The date is 1910 - 1930.