40 mm anti-aircraft shell? - FIREARMS - U.S. Militaria Forum

We are cleaning out my mother-in-law's condominium and found this item in a trunk in the garage. I did a little snooping on the Internet and it looks like it's a 40 mm antiaircraft shell casing. The stamp on the head of the shell near the primer is 1943. The shell was in a round tube and the cap

Morphy Auctions Auction Catalog - Firearms & Militaria - Day 1 Online Auctions

WWII U.S. Navy Bureau of Ordnance 40mm Cannon Ammunition Display Board - ORDNANCE - U.S. Militaria Forum

Anti aircraft shells hi-res stock photography and images - Alamy

A 40mm bofors anti-aircraft shell (1943) on the USS New Jersey Iowa Class Battleship, Delaware River, New Jersey, United States Stock Photo - Alamy

WWII U.S. Navy Bureau of Ordnance 40mm Cannon Ammunition Display Board - ORDNANCE - U.S. Militaria Forum

40 mm anti-aircraft shell? - FIREARMS - U.S. Militaria Forum

WW2 German SPAAGs Archives - Tank Encyclopedia

U.S. 40mm Bofors Anti-Aircraft (WWII)

20mm M55 A2 - ORDNANCE - U.S. Militaria Forum