This type horn is a period copy of a Tansel horn, and yours appears to have been copied from an Indiana period Tansel horn based on its simple spout strap ring and geometric carvings. A number of these horns exist, some with good quality carving of figures that mimic Tansel work, but not quite to the level of the Tansels.
These horns, in my opinion, were created by individuals who had seen a Tansel horn, were impressed by it, and wanted a "somewhat similar" horn. Either they didn't live close enough to the Tansels to acquire an original horn, or perhaps finances were an issue and they didn't have the money... so they made their own or had a more competent neighbor make one for them.
I have several of these "look-alike" horns, a couple plain ones and a couple carved ones, as an interesting "relative" of the Tansels' work. Yours is a nice example with its geometric carving and clean "fish-mouth" at the throat. Probably made in Indiana [or close by] in the mid-1840s.
Shelby Gallien