By A Mystery Man Writer
This late 1800s antique shotgun shell brass is in the hard to find 8 gauge size and was made by Union Metallic Co.
The Black Powder Rifle: The Story of the First Precision Firearms
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The Guns of John Moses Browning, Book by Nathan Gorenstein, Official Publisher Page
1800's shotgun shell??
Old brass hulls
If someone found shotgun shells in the 1870s, would they have been able to determine what model of shotgun was used? - Quora
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Brass UMC Co. Shotgun Shells, Winchester Shells, Excelsior Loading Tools, Percussion Cap Lot: Flying Tiger Antiques Online Store
Old Air-Gun Canes: Deadly Accessories for the Dandy - Guns and Ammo