This bottle is listed in Ring and Hamm as 1860 to 1870. There is some debate as to its form, whether it is a cannon or a lighthouse. Ring and Hamm lists it as scarce.
That is a GREAT bottle, owned one with my late BITTERS collection. I won't ask what you paid, that's none of my business, but I suspect it was less than the mid-three figures it's worth. I think mine sold for $450.