I collect Clevenger reproduction flasks and have their cornucopia flask. Your flask is nothing like the Clevenger. I also have an authentic early cornuopia flask and thickiness pf the g;ass and weight are not necessarily the bottom line in determining the age of bottles. Clarity of the embossing is a better measure of authenticity. Other than the Clevenger Glass Works there weren't many interested in reproducing hand blown bottles. Even the Clevengers didn't make much money doing it. Wheaton produced vast quantities of machine made reproductions but they shouldn't fool anyone.MY friend who professes to know about old glass says this flask was way to heavy to be an original. I will look up Clevenger repro.