WW2 Canadian Dated 20mm Ammunition Shell Casing in Ammunition

This particular 20mm casing was manufactured in Dominion Arsenal, Québec, Canada

high explosive cartridge

What is the average value of a WWI or WWII artillery shell, and

War Shell Casing

Trench art bullet lighter - Doughboy Military Collectables

Canadian alloy cases - General Ammunition Discussion

SHELL CASINGS – Artillery Works Co

1945 WWII 20MM Anti-Aircraft Bullet Casing M21A1 S.M.C., 7

Found this 20mm shell casing in my late Grandpa's house. Can anyone help decipher what's written on it? (I want to know where/when it originated). : r/Firearms

Canadian Navy Guns

List of military headstamps - Wikipedia

WW2 1944 British Oerlikon 20mm Ammunition Shell Casing in Ammunition