Shotgun case?

This week I received a question about the top of this knife.
Unfortunately I could not answer the question.

Could it be they used an old shot case for this knife?
Any answer is appreciated.

Rgds
Dutch

Have you tried to look up the number as a patent number? Is the knife marked with a maker / city or country, as a place to start.

For what it’s worth It doesn’t look to be a shotgun case to me, just a brass ferrule / cap.

On a shot shell the rings, or designs around the body above the rim were to hold the paper body from being separating from the head when ejected & not leaving the paper body in the chamber to be dug-out. The rings & marking on this look to be engraved and not so much impressed.

Winchester / John Gardner had a patent in the US for this: #563,157, Jun. 30, 1896

Almost 200 clicks.

By the skill of the forum I am sure now this item has nothing to do with ammunition

Pete, thanks for your time for looking over the item.

Kind regards
Dutch