Antique Figural Bottle Decanter Hand Holding Dagger Knife

Antique Figural Bottle Decanter Hand Holding Dagger Knife Very clear crystal/glass with a highly polished disk type pontil indicating a high quality. there is no label or signing. Please do some research on this item. I am not an expert in this area and the few that I have seen in research are quite impressive such as " This bottle may depict the hand of Charlotte Corday who killed Jean Paul Marat with a knife during the French Revolution. French antique." I have found no indication that this item was mass replicated.
Measures-
14 1/4" high x 5" diameter
Weighs almost 3 lbs.