Whitworth artillery shell, captured? at Fort Fisher, Id'd, (good History), Civil War?

Object Number: 
X.403
Date: 
1855-1865
Medium: 
Iron, brass
Dimensions: 
Overall: 9 1/4 x 3 in. ( 23.5 x 7.6 cm )
Marks: 
stamped: exterior: "3 IN WHITWORTH SHELL/CAPTURED IN FORT FISHER/JAN. 15 1865 BY R. ADML' PORTER"
Description: 
Iron and brass Whitworth artillery shell; tapered, cylindrical iron shell with flat base, rounded top, and brass collar for screw-on cap; mark stamped onto oval flutes on center exterior.
Due to ongoing research, information about this object is subject to change.
Creative: Tronvig Group