12 Pound Bormann Fused Case Shot Artillery Shell

12 Pound Bormann Case Shot Fused Artillery Shell - Deactivation drill hole at bottom.  Nice Bormann fuse present.  

Federal Spherical “12 Pound Bormann”

DIAMETER: 4.52 inches
GUN: 12-pounder smoothbore, 4.62-inch caliber
LENGTH: -
WEIGHT: 9 pounds 4 ounces
CONSTRUCTION: Shell
SABOT: Wooden cup (missing)
FUZING: Bormann time fuze

The artillerist used a metal punch to pierce the thin metal at the desired time marking.  This exposed a section in the horseshoe-shaped horizontal powder train.  When the cannon discharged, the flame from the explosion ignited this powder train.