i have been looking at this horn every day for the past three. I like the shape and the color, and I would still like it even if it wasn't carved and scrimshawed.
And the scrimshaw is very nice. But the part that keeps bringing me back is the plug for the spout. This may seem trivial, but I like the shape as it perfect to hold with your teeth while one is using the horn. I see you have a hole in it for attachment I suppose.
I do not really like to attach this plug to the horn, so I do loose them. Consequently, I have to make field expedient ones.
I lost one while squirrel hunting a few weeks back. The replacement will be made in the shape you made.