that is a 12 lb shell, with wooden fuse, the Potassium Nitrate fuse. I owned two 12 and still have one 24 lb shell, i sold the 12 lb shells for 150 dollars. that about there value if rough condition, unless it is a POLYGONAL cavity shell, then its worth alot more, alot. but you will never know unless you remove the fuse. or cut the shell in half. has it been disarmed?? if not, then its not a problem, there a a fellow collector in winchester that only charges like 40 dollars to drill and disarm the shell, he is very good. i will try to get a pic up here of my 24 lb shell, the wood fuse means it is early war or confederate shell. no way to know.
rick bryan
the fuse will look like concrete untill you scratch it. then you will see its like plaster.