This is an early 19th century priming horn that is in white and black colors. It is a tiny priming horn and is possibly a late 18th century horn because there are no nails used in its construction. The wood plug on the large end was carved so well that it fits perfectly in the opening that it is simply glued in. It is secure with no holes or openings that would have allowed the fine priming powder to leak out of the horn.
Priming powder horns were filled with fine priming powder that was poured into the priming pan of a musket and were smaller than the normal powder horn measuring only 5-6" in length. This fine powder was ignited by sparks given off by the striking of the flint against the frizzen. It has the owner's initials carved into the wood plug at it's large end and great screw marks or scribe marks on the smaller end. 
It is 5.5" long.