Looks like a brownware storage crock... out here they called them Oyster crocks... along our area, there was once a huge market for oysters, they were shucked ad sold in crocks similar to what you found. It was for bulk storage... but I don't know if oysters were found in your area...
The ones that I have found are in the 1880's range... not extremely valuable but they make great center pieces or vases for flowers at the table. I like them[]