When we see early horns with rather primitive decoration, at times not matching the quality of the original horn's construction and shaping, I usually think they were decorated later in life, perhaps by a family member. Especially during the Victorian Age, when a lot of older items and family momentoes were "spruced up" and used to decorate with. I think this horn is absolutely good, but the carving added quite a bit later. Such additions in this manner, I believe, have nothing to do with "fakes" but rather a later individual simply trying to enhance an older piece so it can be enjoyed more...and perhaps help remind the enhancer and later family members what the old horn "might have seen" back in the day. An old horn 100+ years ago didn't create nearly the interest that it might today, had almost no perceived value, and was a good candidate for having fun with.
An interesting, almost related, story concerns a highly valued Tansel horn, made about 1810, that when first found 50+ years ago was completely painted gold, but darkened and dirty. It had been a Victorian wall hanger for many years, "enhanced" by some well meaning soul with a coat of gold paint to beautify it. It took two subsequent owners to realize it might have carving under all the paint, and finally about 35 years ago it was cleaned off and, low and behold, a great, early Tansel horn emerged. Obviously the first "new" owner didn't have a clue what a Tansel horn was, or they would have probably recognized the "fish mouth" cut on the throat... but the second owner recognized it [or just got lucky] and got a great buy.
Shelby Gallien