Baccarat was founded in 1734 and started making lead crystal glass in1816. The first paperweights were produced around 1846.
Some closepack designs and most with millefiori on muslin include a date cane in the design: B1846 (rare), B1847, B1848 or just 1849 (rare). The B1848 date / signature cane occurs most often. Silhouette canes are rare in 1846 or 1849 dated pieces.