That probably rules out Clevenger Bros. when I'm trying to guess the age. It looks late enough to have used the "CB" mark of some form. It's not easy to tell since that particular type of bottle was so widely reproduced by many companies.
How about the reverse? Does it have another portrait? Usually it will have Taylor. Does it maybe say "Empire Glass Works"? That was another big maker of repro's.
Can you post a picture of the other side. Because there were so many different versions of this flask made particularly around the South Jersey and Philadelphia areas and also in the Buffalo New York region it is difficult to make a determination of which one of about 30 varieties there were of this flask. Is the base smooth? Does it have a rough pontil mark? Does it have a mold line running through the entire bottom. Your flask is real Eric thought it was a Clever Clevenger version but I believe because of the crispness of the relief on the mold and the Tapered top that it is an original 1848 to 1868 flask. Please post the other side. Also include the height of the bottle so I can determine if it is a pint or quart. Thanks Steve.
Well Eric hats off to you I was fooled by the Clevengers you weren't[]!! On page 692 of Mckearins book top left hand picture ( illustration 162) and the description below it. Once it was determined that each side was a bust of Washington the flask is a reproduction. No charted original flasks in the Dyottville type group GI_37 to GI-61 had a bust of Washington on both sides of the flask. It was always Washington/Taylor or Washington and a Sheaf of Wheat.Eric was very correct in his assumption.I have about twenty of these original ones and at first glance this looked quite real. Is an excellent copy of an original.
The only mystery still is the book lists this reproduction a as quart not a pint. You still may have a rare bottle regardless if it is a Clevenger or not.