Post Korean War US 30mm Armor Piercing Projectile (Shell Only), Dated 1955, Inert. Black finished shell is 3 1/2" long. The brass rotating band has a nice patina to it, and it is marked "ZEL - 2 - 17 55 30MM T328". Appears to be solid. The black finish (denotes armor piercing) is about 99%+ complete, with only a few minute scratches and some finish worn off the high edges at the top. Nice display piece. Condition Very Good.