Greener Police Gun Brass Hull Ammo Live Collector Cartridge

This is a live rounds of Greener Police Gun ammunition.  These unique rounds developed by the British Colonial forces for a converted Martini-Henry have a unique deep groove around the primer corresponding to a trident shaped firing pin so that only proprietary ammo could be used to thwart stolen gun use. The cartridges is marked “GREENER E K POLICE GUN” and is in excellent condition with slight age darkening.