Can anyone date this bottle?

[Finders Keepers]

We found this bottle in Pa. down in a camp fire pit, it was in many peaces and we put it together. I need a date on it more than a name or make . We need to date the site before we can dig. I hope it is from the 1860????? The glass is thick on one side and thin on the other.It is about 6" tall. With alot of air bubbles all over.The heat from the fire pit did no damage to the glass.
Thank You

[rip]

Whats the bottom look like ? "open" pontil bottles are generally the earliest , dating from the 1600s to the late 1850s).iron pontil bottles range in age between 1840 and 1865. Bottles made after the Civil War but before the first World War are referred to as "smooth based".All bottles made before the turn of the century are partly or completely hand blown and formed.
Bottles made after about 1914 were produced in much greater number by machine (ABM for Automatic Bottle Machine). Until recently, with relatively few exceptions, bottles made after the turn of the twentieth century have had little value to the collector. The mold seam on machine made bottles will run all the way over the lip. The mold seam on older bottles, pre-1900 (non- machine made), stops before running over the top of the lip.