I don't know what it is ....but why is it not just a small pot from the period before stoves (circ 1840)
I always thought that pots with the legs and handle were made to hang or put on the coals of an open hearth, the way they cooked before stoves. I would think the pots would have come in many sizes. They probably stacked them when not in use.
I know that most collectors on this forum are looking for cast iron from around the 1900's but I think there are many pieces out there from years before this, especially when I see the bottom gate.
I say you have a really nice old pot and I hope I can find one like that some day.