Antique 1700's initial carved Powder Horn

This old, time-worn horn was first dicovered near the eastern part of the late 1700's United States by my very own third great grandfather I believe, who had found it in a hollowed hole of a very old tree. The flask is made of horn, carved at the opening, and plugged with a wooden piece, keeping gun powder from falling out. It has the following initials carved into it, JTF, the actual owner unknown. Again, it is very old and has been passed down through generations to its current owner.