18 Pdr British Shranel shell and casing. Fuse seems to be marked 1917, but unclear. Made in Canada (C - Broad Arrow)  No. 80 fuse. Casing is 1917 and possibly Canadian but only part of the C Broad arrow stamp is visible. Also has regular British broad arrow stamp. Very nice condition. 

WW1 British 18 pounder shrapnel shell and casing