This is a Civil War twist pen. IT IS NOT FROM THE CIVIL WAR ERA, IT IS NEW. The barrel is hand turned using Birdseye Maple wood. The clip is a replica of a model 1861 Springfield Rifle musket. The cap is a replica of a .58 caliber mini ball. The tip is a replica of a .44 caliber. The pen is about 5" long and about 5/8" wide and uses a Parker style ballpoint refill. Because it is handmade, there may be some minor flaws that make it one of a kind.