Late 19th to early 20th century. 9 3/4” length plus the wrist loop. To all appearances, a standard commercial cosh or black jack covered in leather with a large leather knot at each end. Ordinarily, the knot at the striking end would be weighted, but here, it is the pommel of a concealed stiletto with 7” diamond section blade. The absence of a weight, which might cause the dagger to dislodge if a blow was struck, indicates that this weapon was meant to be used as a dagger only and very possibly an assassin’s weapon. Fine preservation as expected, as unlike a cosh, it was used only very rarely.